diff --git a/kernel.c b/kernel.c
index 45d7c2f..1929430 100644
--- a/kernel.c
+++ b/kernel.c
@@ -2,6 +2,9 @@
 //08/13/03 Josh Holtrop
 //Holtrop's Operating System
 
+#define VXR video_mode.XResolution
+#define VYR video_mode.YResolution
+
 #include "k_defines.h"
 
 #include "lib/string.h"
@@ -80,6 +83,30 @@ void isr(dword num)
 				}
 			}
 		}
+		switch(timer)
+		{
+		case 150:
+			video_rectf(VXR*3/11, 0, VXR*4/11, VYR-1, 0x00000088);
+			break;
+		case 200:
+			video_rectf(VXR*7/11, 0, VXR*8/11, VYR-1, 0x00000088);
+			break;
+		case 250:
+			video_rectf(VXR/11, 0, VXR*2/11, VYR*2/5, 0x00000088);
+			break;
+		case 300:
+			video_rectf(VXR/11, VYR*3/5, VXR*2/11, VYR-1, 0x00000088);
+			break;
+		case 350:
+			video_rectf(VXR*5/11, VYR/5, VXR*6/11, VYR*4/5, 0x00000088);
+			break;
+		case 400:
+			video_rectf(VXR*9/11, VYR/5, VXR-1, VYR*2/5, 0x00000088);
+			break;
+		case 450:
+			video_rectf(VXR*8/11, VYR*3/5, VXR*10/11, VYR*4/5, 0x00000088);
+			break;
+		}
 		eoi();
 	}
 	//if (num == 0x21)
diff --git a/video.c b/video.c
index 63f684f..0a4622c 100644
--- a/video.c
+++ b/video.c
@@ -28,7 +28,7 @@ void video_init(ModeInfoBlock *mib)
 	{
 		if (a < (tot / 4))
 			video_psetp(a, 0x00FF0000);
-		else if (a < (tot / 2))
+				else if (a < (tot / 2))
 			video_psetp(a, 0x0000FF00);
 		else if (a < ((tot * 3) / 4))
 			video_psetp(a, 0x000000FF);