diff --git a/user/ball.c b/user/ball.c
new file mode 100644
index 0000000..fc7cd39
--- /dev/null
+++ b/user/ball.c
@@ -0,0 +1,79 @@
+/*
+Copyright (C) 2016-2019 The University of Notre Dame
+This software is distributed under the GNU General Public License.
+See the file LICENSE for details.
+*/
+
+/*
+A fun graphics demo that features text bouncing around the screen.
+*/
+
+#include "library/syscalls.h"
+#include "library/stdio.h"
+#include "library/string.h"
+
+#include "library/nwindow.h"
+
+typedef unsigned int uint32_t;
+
+uint32_t randint(uint32_t min, uint32_t max);
+void move(int *x, int *d, int min, int max);
+
+int main(int argc, char *argv[])
+{
+	int r = 255;
+	int g = 0;
+	int b = 0;
+	int x1 = 12;
+	int y1 = 12;
+	int dx1 = 4;
+	int dy1 = 1;
+	int dr = -1;
+	int dg = 2;
+	int db = 3;
+
+	struct nwindow *nw = nw_create_default();
+
+	int width = nw_width(nw);
+	int height = nw_height(nw);
+
+	nw_clear(nw,0, 0, width, height);
+	nw_flush(nw);
+
+	while(nw_getchar(nw,0)!='q') {
+		move(&x1, &dx1, 0, width - 80);
+		move(&y1, &dy1, 0, height - 1);
+		move(&r, &dr, 0, 255);
+		move(&g, &dg, 0, 255);
+		move(&b, &db, 0, 255);
+		nw_fgcolor(nw,r, g, b);
+		nw_string(nw,x1, y1, "basekernel");
+		nw_flush(nw);
+
+		syscall_process_sleep(75);
+	}
+	nw_clear(nw,0, 0, width, height);
+	nw_fgcolor(nw,255, 255, 255);
+	nw_flush(nw);
+	return 0;
+}
+
+uint32_t randint(uint32_t min, uint32_t max)
+{
+	static uint32_t state = 0xF3DC1A24;
+	state = (state * 1299721) + 29443;
+	return min + ((state >> 16) % (max - min + 1));
+}
+
+void move(int *x, int *d, int min, int max)
+{
+	*x += *d;
+	if(*x < min) {
+		*x = min;
+		*d = randint(1, 10);
+	}
+	if(*x > max) {
+		*x = max;
+		*d = -randint(1, 10);
+	}
+}