Here are a few more of my entries for #tweetcoding:

"Moskitos":
g.clear();ls(1);o[i++]=[mouseX,mouseY,2*r(),2*r()]; for each(p in o){mt(p[0],p[1]); lt(p[0]+=2*s(p[1]*p[2]),p[1]+=2*s(p[0]*p[3])); };i%=2000

"Love in 3D":
if(i<250&&(x=y++)) with(addChild(new TextField)) text="<3",x=r()*500-250,y=r()*500-250,z=i*2-250, rotationX=rotationZ=r()*360;rotationY=i++

"Hyperdrive":
if (!o.b)addChild(o.c=new Bitmap(o.b=new BitmapData(500,500))),o.b.noise(2); z=s(i-=0.01)*15;o.c.z=-z;o.b.draw(this,o.o,o.o,"hardlight");

"Fibonacci Sequence":
if(!i)i=1,o.b=0,o.c=addChild(new TextField),o.c.autoSize="left",o.c.wordWrap=o.c.multiline=1; o.c.appendText(" "+i),o.a=o.b,o.b=i,i+=o.a

"All Invaders":
if(!i) g.beginFill(0),a=b=i=64,d=511; g.drawRect(a&=d,b&=d,i,i); g.drawRect(d-a+1-i,b,i,i); a+=r()<0.4?i:0;b+=r()<0.4?i:0;

"The Golden Days":
g.clear();g.beginFill(0); x=y=20;for(i=81;i--;g.drawCircle(40*a,40*b,d*2)) a=(i%9),b=int(i/9), d=m.sqrt((d=mouseX/40-a)*d+(d=mouseY/40-b)*d)

"Superstar":
g.beginFill(r()<0.4?0:1e8);q=r()*640;c=r()*480;a=2;u=r()*10; for(d=12;--d;(d<11?lt:mt)(q+u*a*s(i+=0.63), c+u*a*s(i+1.57)),a=7-a){}