80386 machine code, IBM PC DOS, 38 bytes

hex:

B0 13 CD 10 68 00 A0 1F 66 C7 06 00 00 28 2C 24 00 66 C7 06 40 01 2C 30 34 00 66 C7 06 80 02 24 34 20 00 CD 16 C3 

asm:

mov al,13h int 10h ; initialize vga 13h mode (320x200x256 colors) push 0a000h pop ds ; push video buffer address to ds mov dword ptr ds:0, 242c28h ; print 3 pixels mov dword ptr ds:320, 34302ch ; print 3 pixels mov dword ptr ds:640, 203424h ; print 3 pixels int 16h ; wait for any keypress ret # exit to os 

scaled output from dosbox: