happyface

happyface.js

function makerectangle(left,right,bottom,top){
  return function(x,y){
    return (x>left && x<right && y > bottom && y < top)
  }
}

function makecircle(cx,cy,r){
  return function(x,y){
    return Math.pow(x-cx,2)+Math.pow(y-cy,2)<Math.pow(r,2)
  }
}

function makesmile(width, thickness, cx, cy){
  return function(x,y){
    return makecircle(cx,cy,width)(x,y) && !(makecircle(cx,cy,width-thickness)(x,y)) && y>cy;
  }
}

function foobar(x,y){ 
  return makecircle(120,120,100)(x,y) && !(makesmile(70, 10, 120, 120)(x,y) || makecircle(90,70,15)(x,y) || makecircle(150,70,15)(x,y)) || makecircle(156,70,5)(x,y) || makecircle(96,70,5)(x,y)
}

emit(foobar);