function _draw()for x=0,63 do for y=0,63 do k=rnd(3)-1 a=x*2+k b=y*2+k c=pget(a,b) c+=flr(rnd(9)/8) pset(a+rnd(3)-1,b+rnd(3)-1,c)end end end |

Warning: This contains flashing colours.

c=0 t=0 function _draw() for i=124,4,-4 do a=64-i b=64+i rect(a,a,b,b,c) c=(c+1)%16 end t+=0.01 x=cos(t)*9 y=sin(t)*9 camera(x,y) end |

t=0 while 1 do cls() for i=0,14 do y=84+4*sin(t+i/15) rectfill(i*9-5,0,i*9+5,y,7) circfill(i*9,y,5) end circ(25,25,15,0) t+=.01 flip() end |

The character limit pretty much forces you to make something abstract, but I wanted to try and make a scene of some sort. :)

t=0 c=0 x=3 y=4 function _update() t+=.008 cls() for i=16,0,-1 do c+=1 circ(64+cos(t)*x*i,64+sin(t)*y*i,i,c%16) end end |

Here's my humble contribution to this great thread.

waterfall

cls()t={}w=128 function _draw()for i=1,w do y=t[i] if(y==e)y=flr(rnd(w))-9 rect(i,y,i+2,y,({1,7,12})[flr(rnd(3))+1])t[i]=y+1 end e=w end |

This takes advantage of the fact that comparing two nil values together is true to initialize a table on the first pass inside the draw loop!

125

t=0 m=12 function _draw()t+=0.05 for n=0,m*m do x=n%m y=n/m circfill(x*12,y*12,12+4*cos(t+y/5)+4*sin(t+x/7),8+(x+y)%8)end end |

edit: forgot to replace a few 12's with "m" to save 3 more chars :P

function _draw()for x=0,63 do for y=0,63 do k=rnd(3)-1 a=x*2+k b=y*2+k rectfill(a-1,b-1,a+1,b+1,pget(a,b)+flr(rnd(99)/98))end end end |

c=0

s=0

f=0

while 1 do

v=(c/4032*cos(s))*(f/4+cos(f/5)*f/4)

poke(0x6000+c,v-rnd(1))

c+=1

s+=.01551+0x6000

```
if(c>128*63)then c=0
f+=0.1 end
```

end

Not tweet length, sadly >:(

cls()

c=0

f=0

while 1 do

for x=1,128 do

for y=10,80 do

r=rnd()

p = pget(x,y)

pn = pget(x+1,y)

if(pn~=0 and p==0)then

if(r<.8)pset(x,y,pn)

else pset(x,y,p*.99*(y/128)) end

end

end

c+=1

circfill(120,50+cos(f)*25,r*3,7)

if(c>5)then f+=rnd(.02)

end

end

I decided I wanted to try to make something that was *somehow* interactive. Here's my tweet-length "RPG" (ha).

You press "Z" to "attack" and then the monster attacks. Monster HP on the left, your HP on the right. Attack until one of you (or both) is dead. If you run this in the PICO-8 app, it'll quit back to the command line after it ends. But in the cartridge version I guess it's perma-death. ;)

u=8 m=6 cls()function _draw() if btnp(4) then m-=flr(rnd(3)) u-=flr(rnd(4)) print(m..":"..u) end if(m<=0)print(":)") if(u<=0)print(":(") end |

I had a version that displayed a bit more information to the player, but had to remove it to fit in 140 chars. :D

Owen

m=128 function _draw() for k=0,m^2 do x=k%m y=k/m d=pget(x,y) if(d==0)pset(x,y,pget(x+rnd(2)-1,y+rnd(2)-1))end end |

s=0 x=64 _=127 while x>0 and x<_+1 do memcpy(24576,24640,8128)pset(x,_,0)x+=4-rnd()*8 pset(x,_,-abs(64-x)/8)flip()s+=1 end print(s.." \135") |

140/140

Which side will win, right or left? What will your final score be? Never before have video games been as tense and exciting as this!

Always changing

cls()poke(0x5f2c,7)a=0 n=2 function _draw()for i=64,0,-(n%7) do s=64-abs(sin(a)*i)circfill(s,s,i,i%2)a+=0.001 end n+=0.002 end |

As seen in Terminator 2: Judgement Day

cls()poke(0x5f2c,6)a=0 function _draw() for i=64,0,-3 do circ(64-(sin(a)*i),64+cos(a)*i,i,i)a+=0.001 end end |

Classic 3d ribbon effect in a bite-sized package :)

t=0k=256 function _draw()cls()t+=.01 for y=0,k do v=9*sin(t+y/k)d=9*sin(t+v/k)x=v+d+48 rect(x,y,x+32,y,2)rect(x+d,y,x+d+32-d*d/9,y,8)end end |

Exactly 140 :)

Press <z> to flap. Quite playable for the size IMO. Try to finish the level without hearing a single crash sound.

d=16 w=64 x=0 y=0 function _draw() x+=2 x%=d*w cls()map(0,0,-x,0,d*d,d)spr(0,w,y)y+=1 if(fget(mget((x+w)/8,y/8),0))sfx(0) if(btn(4))y-=6 end |

I hope using sprites is not cheating ;)

I couldn't quite do what I wanted in one tweet, so I used two (heresy!)

function r(a) return flr(rnd(a)) end function n(a,b) return {a,b,(r(4)+1)*(2*r(2)-1),(r(4)+1)*(2*r(2)-1),r(15)+2} end a={n(9,9)} function _draw() cls() for b in all(a) do b[1]+=b[3] b[2]+=b[4] if (b[1]>120 or b[1]<8) b[3]*=-1 if (b[2]>120 or b[2]<8) b[4]*=-1 circfill(b[1],b[2],3,b[5]) end add(a,n(a[1][1],a[1][2])) end |

edit: tweets are 140 not 160 chars. Failure on all accounts :)

I was trying to optimize another thing and got this.

cls() x=0 y=64 t=0 c=1 function _draw() if t<0 then t=flr(rnd(61)) c=t%14+1 end t-=1 x+=0.5 y+=flr(rnd(3)-1) pset(x%128,y%128,c) end |

(edit: 132 chars)

function _draw() cls() if rnd(7)<1 then x2=rnd(128) for j=0,4 do x=x2 for i=0,15 do l=x x+=rnd(30)-15 line(x,i*9+9,l,i*9,10) end end end end |

A classic C64 oneliner, now with LINEs

while 1 do for x=0,22 do a=flr(rnd(2)) line((x+a)*6-a,122,(x+1-a)*6,128) end print("") end |

exactly 140 char long

a={"__","--","==","()","<>","()","{}","..","`'"} while 1 do for x=0,20 do c=flr(rnd(999)) print(a[c%#a+1],x*8,122,c) end if(c<1)print"" end |

memcpy(0,24591,336)cls()sset(0,5)t=0::_::for i=0,15 do for j=0,15 do for k=8,15 do pal(k,i+j+k+t)end spr(0,8*i,8*j)end end t+=1 flip()goto _ |

137/140

If I only had two more characters I'd be able to fit in a cls() and fill the entire screen.

**Edit:** was able to squeeze in a cls() by using goto

@Alberton: oh man, that's genius. If it wasn't for the character limit you could probably do something nice with this by combining it with the secret wide characters (\130,\140 etc).

Just had to try and extend Alberton's tileset maker with some of the extra-wide characters. 325/140 (lol)

I stole kometbomb's method and made a tribute to my home city:

function _draw()cls(1)srand()for i=0,296 do z=i/99+11 x=(rnd(128)-time()*z*z)%133 y=(rnd(128)-x)%128line(x,y-z,x-z,y+z,z-6)end end |

130 chars

a={7,6,13,5,1,0} cls() t=0 while 1 do x=rnd() j=x+t/1000 y=rnd(60) c=flr(x*x*5+y*y*.0015+1) circ(cos(j)*y+64,sin(j)*y+64,4,a[c]) t+=0.05 end |

s=0 o=1 while 1 do o-=.001 if(o<1) then o=99 cls() print(s,9,4,7) end if(btn(4)) then if(o<9 and o>2) s+=1 o=1 end print("^",9,o,8) end |

140 characters on the button. I wanted to make a game that involved reflexes and scoring. It ended up being very, very simple.

uuuuhhhh these are all absolutely incredible and i personally love each of you

o={">","z","/"} c=0 ::z:: b=-8 c+=1 p=o[c%3+1] ::s:: for y=0,26 do for i=0,13 do print(p,b+i*12,y*5,i+c) end end b+=.04 if(b>4)goto z goto s |

x=64w=128 cls()circfill(x,x,32,8)circfill(x,x,16,0)circfill(x-16,x-16,8,7) for i=0,w do j=sin(i/255)*28line(i,0,i,x+j,5)line(i,x-j,i,w,5)end |

cls()b=128 x=b y=b d=0 while 1 do x+=cos(d) y+=sin(d) if pget(x,y)==0then d=rnd(1)end if d%(b*b)>.87then x=70 y=b end pset(x,y,d*4+7) end |

137 chars.

I wanted to make a self-playing breakout at first but couldn't fit it below 200 chars, so here's a stripped version :)

well after last night's experiement I had to make a proper one <140 chars - got it to 138 in the end :)

a=9 b=40 c=1 e=1 f=2 function _draw() for i=1,c do a+=e b+=f if(a>128 or a<0)e*=-1 if(b>128 or b<0)f*=-1 circfill(a,b,6,c%15) end c+=1 end |

Warning: flashing colours!

s={} function _draw() cls() local o={} o.x=rnd(150) o.y=0 add(s,o) foreach(s, function(s) s.y+=1 s.x-=rnd(1) print('*',s.x,s.y,7) end) end |

139 character snow storm.

use the submit cart option from the forum main area, then insert that tag in a normal post!

Thanks Adam Atomic!

Tunnel thing like:

t=0 function _draw()cls()for i=-70,15 do circ(64+cos(t*.5)*(i^2)*.015,64+sin(t*.7)*(i^2)*.01,(i+70),(i+t*100)%8+8)end t-=.01 end |

Hello there, I ended up with this. I wanted first to play with sound but it took way too much characters...

t=0 while 1 do for y=16,128,32 do for x=0,128,16 do c=x/69+y/9+t rectfill(x,y+sin(t*2)*9,x+16*sin(c),y+21*cos(c),c)end end flip() t-=.04 end |

building on the snow from @jefferycampbell, I did a little parallax scrolling starfield.

exactly 140

t={}function _draw()cls()add(t,{s=rnd()*3.1,x=0,y=rnd(127)}) foreach(t,function(s)s.x+=s.s n=s.x>127 and del(t,s)pset(s.x,s.y,s.s+5) end)end |

edited to save a few characters and get better colors.

?"[music]" j=6::s::if stat(20)==-1 or j==6 then j+=1 n={0,3,5,7,10,12,15}for i=0,63 do poke(12868+i,n[1+(j+i^3)%7]+12*7)end sfx(1)end goto s |

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