Rule 30

Rem http://en.wikipedia.org/wiki/Rule_30
clg
fastgraphics
graphsize 900,450
plot (450,1)
print pixel (10,10)
For y = 1 to 450
For x = 1 to 900
if pixel (x-1,y-1)=0 and pixel (x,y-1)<>0 and pixel (x+1,y-1)<>0 then plot(x,y)
if pixel (x-1,y-1)<>0 and pixel (x,y-1)=0 and pixel (x+1,y-1)=0 then plot(x,y)
if pixel (x-1,y-1)<>0 and pixel (x,y-1)=0 and pixel (x+1,y-1)<>0 then plot(x,y)
if pixel (x-1,y-1)<>0 and pixel (x,y-1)<>0 and pixel (x+1,y-1)=0 then plot(x,y)
next x
refresh
next y