diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f0c9b81
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*.o
+main
diff --git a/box.c b/box.c
index 083d141..33217c2 100644
--- a/box.c
+++ b/box.c
@@ -1,112 +1,136 @@
+
+/*
+ * Copyright (C) Artsiom D.
+ * Copyright (C) shit-co.de
+ */
+
+ 
+#include <curses.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
 #include "box.h"
+#include "ui.h"
+#include "util.h"
 
-static void draw_rectangle(size_t x, size_t y, size_t width, size_t height)
+
+static void draw_rectangle(size_t x, size_t y, size_t width, size_t height);
+static void draw_vertical(struct box *, size_t x, size_t y, size_t width, size_t height);
+static void draw_horizontal(struct box *, size_t x, size_t y, size_t width, size_t height);
+static void draw_button(struct box *, size_t x, size_t y, size_t width, size_t height);
+
+
+static void
+draw_rectangle(size_t x, size_t y, size_t width, size_t height)
 {
-	mvaddch(y, x, '+');
-	mvaddch(y + height - 1, x, '+');
-	mvaddch(y + height - 1, x + width - 1, '+');
-	mvaddch(y, x + width - 1, '+');
+	size_t w = width - 1;
+	size_t h = height - 1;
 
-	for (size_t i = 1; i < height - 1; i++) {
-		mvaddch(y + i, x, '|');
+	/* corners */
+
+	ui_char(x, y, '+');
+	ui_char(x, y + h, '+');
+	ui_char(x + w, y + h, '+');
+	ui_char(x + w, y, '+');
+
+	/* vertical borders */
+
+	for (size_t i = 1; i < h; i++) {
+		ui_char(x, y + i, '|');
 	}
 
-	for (size_t i = 1; i < height - 1; i++) {
-		mvaddch(y + i, x + width - 1, '|');
+	for (size_t i = 1; i < h; i++) {
+		ui_char(x + w, y + i, '|');
 	}
 
-	for (size_t i = 1; i < width - 1; i++) {
-		mvaddch(y, x + i, '-');
+	/* horizontal borders */
+
+	for (size_t i = 1; i < w; i++) {
+		ui_char(x + i, y, '-');
 	}
 
-	for (size_t i = 1; i < width - 1; i++) {
-		mvaddch(y + height - 1, x + i, '-');
+	for (size_t i = 1; i < w; i++) {
+		ui_char(x + i, y + h, '-');
 	}
 }	
 
-void draw_button(struct box *b)
-{
-	draw_rectangle(x, y, b->width, b->height);
-	
-	if (b->highlighted) {
-		attron(A_UNDERLINE);
-	}
-	
-	attron(COLOR_PAIR(b->color));
-	
-	mvaddstr(y + b->height / 2, x + b->width / 2 - strlen(b->name) / 2, b->name);
-
-	if (b->highlighted) {
-		attroff(A_UNDERLINE);
-	}
-
-	attroff(COLOR_PAIR(b->color));
-}
-
-void draw_chart(struct box *b, size_t x, size_t y, size_t width, size_t height)
+
+static void
+draw_button(struct box *b, size_t x, size_t y, size_t width, size_t height)
 {
+	ui_color_on(b->color);
 	draw_rectangle(x, y, width, height);
-
-	size_t chart_width = width - 2;
-	size_t chart_height = height - 2;
-	size_t chart_x = x + 1;
-	size_t chart_y = y + 1;
-
-	for (size_t i = 0; i < chart->length; i++) {
-		for (size_t j = 0; j < chart->prices[i]; j++) {
-			mvaddch(chart_height - (chart_y + j), chart_x * i, '?');
-		}
-	}
+	ui_string(x + width / 2 - strlen(b->name) / 2, y + height / 2, b->name);
+	ui_color_off(b->color);
 }
 
-void draw_vertical(struct box *b, size_t x, size_t y, size_t width, size_t height)
+
+static void
+draw_horizontal(struct box *b, size_t x, size_t y, size_t width, size_t height)
+{
+	die("Don't call me");
+}
+
+
+static void
+draw_vertical(struct box *b, size_t x, size_t y, size_t width, size_t height)
 {
-	size_t total_pixels = 0;
 	double total_fills = 0;
 
 	for (size_t i = 0; i < b->length; i++) {
-		struct box *child = b->children[i];
-
-		switch (child.length.type) {
-		case LENGTH_PIXEL:
-			total_pixels += child.length.pixels;
-			break;
-		case LENGTH_FILL:
-			total_fills += child.length.fills;
-			break;
-		}
+		total_fills += b->children[i]->fills;
 	}
 
-	size_t fill_pixels = height - total_pixels;
-	double pixels_per_fill = fill_pixels / total_fills;
+	double pixels_per_fill = (double)height / total_fills;
 
-	double current_y = 0;
+	double current_y = y;
 
 	for (size_t i = 0; i < b->length; i++) {
 		struct box *child = b->children[i];
-
-		double width;
-
-		switch (child.length.type) {
-		case LENGTH_PIXEL:
-			width = child.length.pixels;
-			break;
-		case LENGTH_FILL:
-			width = child.length.fills * pixels_per_fill;
-			break;
-		}
+		double height = child->fills * pixels_per_fill;
+		draw_box(child, x, current_y, width, height);
+		current_y += height;
 	}
 }
 
-void draw_box(struct box *b, size_t x, size_t y, size_t width, size_t height)
+
+struct box *
+new_button_box(char *name)
+{
+	struct box *button = malloc(sizeof(struct box));
+
+	button->type = BOX_BUTTON;
+	button->name = name;
+	button->fills = 1;
+	button->color = UI_RED;
+
+	return button;
+}
+
+
+struct box *
+new_vertical_box(void)
+{
+	struct box *box = emalloc(sizeof(struct box));
+
+	box->type = BOX_VERTICAL;
+	box->fills = 1;
+	box->color = UI_RED;
+	box->children = emalloc(sizeof(struct box *) * 100);
+	box->length = 0;
+
+	return box;
+}
+
+
+void
+draw_box(struct box *b, size_t x, size_t y, size_t width, size_t height)
 {
 	switch (b->type) {
 	case BOX_BUTTON:
 		draw_button(b, x, y, width, height);
 		break;
-	case BOX_CHART:
-		draw_chart(b, x, y, width, height);
-		break;
 	case BOX_VERTICAL:
 		draw_vertical(b, x, y, width, height);
 		break;
diff --git a/box.h b/box.h
index bea1485..09af1b7 100644
--- a/box.h
+++ b/box.h
@@ -1,54 +1,44 @@
+
+/*
+ * Copyright (C) Artsiom D.
+ * Copyright (C) shit-co.de
+ */
+
+
+ 
 #pragma once
 
-#include "chart.h"
+#include "ui.h"
+
 
 enum box_type {
-  BOX_VERTICAL,
-  BOX_HORIZONTAL,
-  BOX_CHART,
-  BOX_BUTTON,
-};
-
-enum length_type {
-  LENGTH_FILL,
-  LENGTH_PIXEL,
-};
-
-struct length {
-  enum length_type type;
-  union {
-    double fill;
-    double pixel;
-  };
+    BOX_VERTICAL,
+    BOX_HORIZONTAL,
+    BOX_BUTTON,
 };
 
 struct box {
-  enum box_type;
+    enum box_type type;
+    enum ui_color color;
+    double fills;
 
-  size_t width;
-  size_t height;
+    union {
+    	/* button */
+    	struct {
+    	    char *name;
+    	};
 
-  enum color color;
-
-  union {
-    struct chart *chart;
-
-    /* button */
-    struct {
-      char *name;
+    	/* container boxes */
+    	struct {
+    	    struct box **children;
+    	    size_t length;
+    	};
     };
-
-    /* container boxes */
-    struct {
-      struct box *children;
-      size_t length;
-    };
-  };
 };
 
-box *new_chart_box(struct box *, size_t width, size_t height);
-box *new_button_box(struct button *, size_t width, size_t height);
-box *new_vertical_box(size_t width, size_t height);
-box *new_horizontal_box(size_t width, size_t height);
 
-void draw_box(struct box *);
+struct box *new_button_box(char *name);
+struct box *new_vertical_box(void);
+struct box *new_horizontal_box(void);
+
+void draw_box(struct box *, size_t x, size_t y, size_t width, size_t height);
diff --git a/license b/license
new file mode 100644
index 0000000..a960c05
--- /dev/null
+++ b/license
@@ -0,0 +1,14 @@
+Copyright (c) 2025 shit-co.de
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
diff --git a/main.c b/main.c
index 3b670e8..7dc2131 100644
--- a/main.c
+++ b/main.c
@@ -1,214 +1,35 @@
-#include <stdio.h>
-#include <unistd.h>
+
+/*
+ * Copyright (C) Artsiom D.
+ * Copyright (C) shit-co.de
+ */
+ 
+
 #include <stdlib.h>
-#include <string.h>
-#include <curses.h>
-#include <math.h>
-#include <time.h>
+#include <unistd.h>
 
-struct coin {
-	const char *name;
-	const char *description;
-	struct chart chart;
-};
+#include "box.h"
+#include "ui.h"
 
-struct chart {
-	double *prices;
-	size_t length;
-};
 
-struct chart new_chart(size_t length)
+int
+main(void)
 {
-	double *prices = malloc(length * sizeof(double));
+	struct box *parent;
 
-	prices[0] = 20;
-	for (size_t i = 1; i < length; i++) {
-		prices[i] = prices[i - 1] + (rand() % 3 - 1.5);
-	}
+	ui_init();
 
-	return (struct chart) {
-		.length = length,
-		.prices = prices
-	};
-}
+	parent = new_vertical_box();
 
-enum game_state {
-	GAME_BEGIN,
-	GAME_IDLE,
-	GAME_BUY,
-	GAME_SELL,
-	GAME_END,
-};
+	parent->length = 2;
+	parent->children[0] = new_button_box("hello!");
+	parent->children[0]->color = UI_BLUE;
+	parent->children[1] = new_button_box("quit");
 
-enum color {
-	color_red,
-	color_green,
-	color_blue,
-};
+	draw_box(parent, 0, 0, 20, 30);
+	ui_refresh();
 
-struct button *new_button(char *name, enum color color, size_t width, size_t height)
-{
-	struct button *button = malloc(sizeof(struct button));
-	button->name = name;
-	button->width = width;
-	button->height = height;
-	button->next = NULL;
-	button->color = color;
-	button->highlighted = false;
-	return button;
-}
-
-struct game {
-	enum game_state state;
-	int bank;
-	struct coin coin;
-	struct button *button;
-};
-
-void draw_button(struct button *b, size_t x, size_t y)
-{
-	draw_box(x, y, b->width, b->height);
-	
-	if (b->highlighted) {
-		attron(A_UNDERLINE);
-	}
-	
-	attron(COLOR_PAIR(b->color));
-	
-	mvaddstr(y + b->height / 2, x + b->width / 2 - strlen(b->name) / 2, b->name);
-
-	if (b->highlighted) {
-		attroff(A_UNDERLINE);
-	}
-
-	attroff(COLOR_PAIR(b->color));
-}
-
-void draw_chart(struct chart *chart, size_t x, size_t y)
-{
-	const size_t height = 30;
-	const size_t width  = chart->length * 2 + 1;
-	
-	draw_box(x, y, width, height + 1);
-
-	for (size_t i = 0; i < chart->length; i++) {
-		for (size_t j = 0; j < chart->prices[i]; j++) {
-			mvaddch(30 - (y + j), x + (i * 2) + 1, '?');
-		}
-	}
-
-	const size_t button_width = (double)(width) / 3;
-
-	struct button *buy  = new_button("buy",  color_red, button_width, 5);
-	struct button *sell = new_button("sell", color_blue, button_width, 5);
-	struct button *scam = new_button("scam", color_green, button_width, 5);
-
-	buy->next = sell;
-	sell->next = scam;
-	scam->next = buy;
-
-	buy->highlighted = true;
-
-	draw_button(buy,  x,  y + height + 1);
-	draw_button(sell, x + button_width, y + height + 1);
-	draw_button(scam, x + button_width * 2, y + height + 1);
-}
-
-enum box_type {
-	BOX_TYPE_BUTTON,
-	BOX_TYPE_CHART,
-	BOX_TYPE_HORIZONTAL,
-	BOX_TYPE_VERTICAL,
-};
-
-struct box {
-	enum box_type type;
-	size_t width;
-	size_t height;
-	enum color color;
-
-	union {
-		/* chart */
-		struct {
-			double *prices;
-			size_t length;
-		};
-
-		/* button */
-		char *name;
-
-		/* horizontal/vertical box */
-		struct {
-			struct box *children;
-			size_t length;
-		};
-	}
-};
-
-void draw_game(struct game *game)
-{
-	clear();
-	mvaddstr(0, 0, game->coin.name);
-	mvaddstr(1, 0, game->coin.description);
-	draw_chart(&game->coin.chart, 5, 5);
-	refresh();
-}
-
-struct box *new_chart_box()
-
-struct box *new_container_box(enum box_type type)
-{
-	struct box *box = malloc(sizeof(box));
-	box->width = 0;
-	box->height = 0;
-	box->type = type;
-	box->children = malloc(sizeof(box) * 100);
-	box->length = 0;
-	return box;
-}
-
-struct box *new_vertical_box(void)
-{
-	return new_container_box(BOX_TYPE_VERTICAL);
-}
-
-struct box *new_horizontal_box(void)
-{
-	return new_container_box(BOX_TYPE_HORIZONTAL);
-}
-
-struct box *new
-
-int main(void)
-{
-	srand(time(NULL));
-	initscr();
-	start_color();
-	init_pair(color_green, COLOR_GREEN, COLOR_BLACK);
-	init_pair(color_red,   COLOR_RED,   COLOR_BLACK);
-	init_pair(color_blue,  COLOR_BLUE,  COLOR_BLACK);
-	cbreak();
-	noecho();
-	nonl();
-	intrflush(stdscr, FALSE);
-	keypad(stdscr, TRUE);
-	clear();
-	refresh();
-
-	struct game game = {
-		.state = GAME_BEGIN,
-		.bank = 1000,
-		.coin = (struct coin) {
-			.name = "Bitcoin",
-			.description = "A fucking scam.",
-			.chart = new_chart(30)
-		}
-	};
-
-	draw_game(&game);
-
-	refresh();
-	
 	sleep(300);
-	endwin();
+
+	ui_end();
 }
diff --git a/makefile b/makefile
index 18469f3..9c1a055 100644
--- a/makefile
+++ b/makefile
@@ -1,2 +1,14 @@
-CFLAGS = -lcurses -std=c23 -Wextra -pedantic -Wall
-main: main.c
+CFLAGS = -std=c23 -Wextra -pedantic -Wall -pedantic
+LDFLAGS = -lncurses
+
+main: box.o main.o ui.o util.o
+
+.PHONY: clean
+
+box.o: box.c
+main.o: main.c
+ui.o: ui.c
+util.o: util.c
+
+clean:
+	rm *.o main
diff --git a/ui.c b/ui.c
new file mode 100644
index 0000000..56fdf55
--- /dev/null
+++ b/ui.c
@@ -0,0 +1,64 @@
+
+/*
+ * Copyright (C) Artsiom D.
+ * Copyright (C) shit-co.de
+ */
+
+ 
+#include <curses.h>
+#include <stdlib.h>
+#include <time.h>
+#include "ui.h"
+
+
+void ui_init(void)
+{
+    srand(time(NULL));
+	initscr();
+	start_color();
+	init_pair(UI_GREEN, COLOR_GREEN, COLOR_BLACK);
+	init_pair(UI_RED,   COLOR_RED,   COLOR_BLACK);
+	init_pair(UI_BLUE,  COLOR_BLUE,  COLOR_BLACK);
+	cbreak();
+	noecho();
+	nonl();
+	intrflush(stdscr, FALSE);
+	keypad(stdscr, TRUE);
+	clear();
+	refresh();
+}
+
+void ui_end()
+{
+	endwin();
+}
+
+void ui_string(size_t x, size_t y, char *s)
+{
+    mvaddstr(y, x, s);
+}
+
+void ui_char(size_t x, size_t y, char c)
+{
+    mvaddch(y, x, c);
+}
+
+void ui_color_on(enum ui_color c)
+{
+    attron(COLOR_PAIR(c));
+}
+
+void ui_color_off(enum ui_color c)
+{
+    attroff(COLOR_PAIR(c));
+}
+
+void ui_refresh(void)
+{
+    refresh();
+}
+
+void ui_clear(void)
+{
+    clear();
+}
diff --git a/ui.h b/ui.h
new file mode 100644
index 0000000..40c90ba
--- /dev/null
+++ b/ui.h
@@ -0,0 +1,28 @@
+
+/*
+ * Copyright (C) Artsiom D.
+ * Copyright (C) shit-co.de
+ */
+
+ 
+#pragma once
+
+
+enum ui_color {
+    UI_RED = 1,
+    UI_GREEN,
+    UI_BLUE,
+};
+
+
+void ui_init(void);
+void ui_end(void);
+
+void ui_color_on(enum ui_color);
+void ui_color_off(enum ui_color);
+
+void ui_char(size_t x, size_t y, char c);
+void ui_string(size_t x, size_t y, char *s);
+
+void ui_refresh(void);
+void ui_clear(void);
diff --git a/util.c b/util.c
new file mode 100644
index 0000000..c3727b5
--- /dev/null
+++ b/util.c
@@ -0,0 +1,34 @@
+
+/*
+ * Copyright (C) Artsiom D.
+ * Copyright (C) shit-co.de
+ */
+
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "util.h"
+
+
+void *
+emalloc(size_t n)
+{
+    void *p = malloc(n);
+    if (p == NULL) {
+        die("malloc fail\n");
+    }
+
+    return p;
+}
+
+
+void
+die(char *fmt, ...)
+{
+    va_list va;
+    va_start(va, fmt);
+    vfprintf(stderr, fmt, va);
+    va_end(va);
+    exit(1);
+}
diff --git a/util.h b/util.h
new file mode 100644
index 0000000..d7f02bd
--- /dev/null
+++ b/util.h
@@ -0,0 +1,14 @@
+
+/*
+ * Copyright (C) Artsiom D.
+ * Copyright (C) shit-co.de
+ */
+
+
+#pragma once
+
+#include <stddef.h>
+
+
+void *emalloc(size_t n);
+void die(char *fmt, ...);