; ******* svisla cara 1 pixel
FOR x,0,MAXX,1
color 0,0,0
line x-1,0,x-1,MAXY
color 255,255,255
line x,0,x,MAXY
wait 20
ENDFOR x

; ******* vodorovna cara 1 pixel
FOR y,0,MAXY,1
color 0,0,0
line 0,y-1,MAXX,y-1
color 255,255,255
line 0,y,MAXX,y
wait 20
ENDFOR y

; ******* sikma cara 1 pixel
FOR y,0,MAXY,1
color 0,0,0
line 0,0,MAXX,y-1
color 255,255,255
line 0,0,MAXX,y
wait 20
ENDFOR y

; ******* sikma cara 1 pixel
FOR x,0,MAXX,1
color 0,0,0
line 0,0,MAXX-x+1,MAXY
color 255,255,255
line 0,0,MAXX-x,MAXY
wait 20
ENDFOR x
