*= $1000
 ; initilization of screen
INT #$13
LDA #$FF
GAME

LDX #0
LDY #0
JSR DRAWRECT

INT #$15

INT #$14
LDY #0
INT #$19
CPY #0
BNE OVER
JMP GAME
OVER
ADC #1
JMP GAME

DRAWRECT ; takes X,Y, and accumulator
MAJOR
LDY #0
MINI 
; INT #$17
INT #$16
INY
CPY #$25
BNE MINI
INX
CPX #$25
BNE MAJOR
RTS