diff --git a/b/test.c~ b/b/test.c~
new file mode 100644
index 0000000..30dd0a0
--- /dev/null
+++ b/b/test.c~
@@ -0,0 +1,25 @@
+#define __LIBRARY__
+#include<stdio.h>
+#include<unistd.h>
+#include<errno.h>
+#define vga_graph_memstart 0xA0000
+#define vga_graph_memsize 64000
+#define cursor_side 6
+#define vga_width 320
+#define vga_height 200
+
+_syscall0(void,init_graphics);
+
+int main(void)
+{
+init_graphics();
+char *p=vga_graph_memstart;
+int i,j,x_pos=20,y_pos=20;
+for(i=0;i<vga_graph_memsize;i++)
+ *p++ = 3;
+for (i=x_pos-cursor_side;i<=x_pos+cursor_side;i++)
+for(j=y_pos-cursor_side;j<=y_pos+cursor_side;j++)
+{
+p=(char *)vga_graph_memstart+j*vga_width+i;
+*p=12;
+}