diff --git a/src/main.c b/src/main.c
index 76d7a46..7c871a1 100644
--- a/src/main.c
+++ b/src/main.c
@@ -6,6 +6,22 @@
 #include "time_func.h"
 #include "sysinput.h"
 
+static void do_draw(void)
+{
+  /*
+  tmp = (char *)Fb_Ptr;
+  memset(tmp, 0xFF, Fb_Info->screenbytes / 2);
+  memset(tmp + (Fb_Info->screenbytes / 2), 0x1B, Fb_Info->screenbytes / 2);
+  */
+  uint16_t pixel = Fb_Info->green_mask;
+  unsigned npix = Fb_Info->screenbytes / sizeof(uint16_t);
+  uint16_t *p = Fb_Ptr;
+  unsigned i;
+
+  for (i=0; i<npix; i++)
+    *p++ = pixel;
+}
+
 int main(int argc, char *argv[])
 {
   int running = 1;
@@ -24,10 +40,8 @@ int main(int argc, char *argv[])
   atexit(Sys_disable_input);
 
   /* temporary drawing here */
-  tmp = (char *)Fb_Ptr;
-  memset(tmp, 0xFF, Fb_Info->screenbytes / 2);
-  memset(tmp + (Fb_Info->screenbytes / 2), 0x1B, Fb_Info->screenbytes / 2);
-
+  do_draw();
+ 
   Log(LINFO, "System ready.");
 
   while (running)