Algorithmic Artscape by...

        //s0.initCam()
        setResolution(1600,900)
        src(o0).modulate(gradient().pixelate(()=>ch.pos*2,2).color(-1,1).brightness(-.5),.1).layer(
        osc(30,()=>play?.1:.6,()=>ch.pos*2).modulate(noise(3),()=>ch.rate*.1).pixelate(9999,()=>ch.play?9999:8)
        .mask(shape(2,.1,0).scrollY(-.5))).out()

        ch={a:0,a0:0,speed:2,fire:0,rate:1,pos:0,play:0}
        update=()=>{
        t=time*ch.speed
        ch.a=t%1;
        index=Math.floor(t%8)
        ch.rate=[1.2,0,0,1.2,0,0,1.2,3.6][index]
        ch.pos=[0.01,0.2,0.11,0.77,0.01,0.11,0.22,0.33][index]+Math.floor((t%32)/8)/4*0.01
        ch.play=[0,1,1,1,1,1,0,1][index]
        if (ch.a0>ch.a) {
        theChuck.setFloat("GRAIN_PLAY_RATE", ch.rate*2)
        }
        theChuck.setFloat("GRAIN_POSITION", (time*2)%1/139*ch.play+ch.pos)
        theChuck.setFloat("GRAIN_POSITION_GOAL", (time*2)%1/139*ch.play+ch.pos+0.002)
        ch.a0=ch.a}