How many characters of code did you use?
277

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g=24576l=1k='+-□■'d={line,line,rect,rectfill}c=7m=memcpy poke(24365,1)s=stat::_::m(g,0,8192)x,y=s(32),s(33)h=s(36) if(btnp(4))l=l%4+1 if(btn(5))c=pget(x,y) d[l](w,z,x,y,c) if(s(34)>0)m(0,g,8192)l=1 print(sub(k,l,l),x-1,y-2,c) if(h!=0)c=(c+sgn(h))%16 if(l<2)w,z=x,y flip()goto _