Loop

[CyberCarsten]

I'm using the following loop to draw random pixels on the screen, but the loop makes the application freeze....anyone know how to avoid this...

Code:

int index;
		 for (index = 0;index<512; index++)
		 {
			int randomcol= 0;
			randomcol = rand()%2;
			if (randomcol == 1)
			{
				SetPixel(hdc,rand()%WINDOW_WIDTH,rand()%WINDOW_HEIGHT,
					RGB(0,0,0));
			}

			if (randomcol=2)
			{
				SetPixel(hdc,rand()%WINDOW_WIDTH,rand()%WINDOW_HEIGHT,
				RGB(255,255,255));
				Sleep(2);
			if (index >510)
			{
				index = 0;
			}

			}