Turtle snow fall

function side(size, level) { if (level==0) { t.fd(size); } else { side(size/3, level-1); t.lt(60); side(size/3, level-1); t.rt(120); side(size/3, level-1); t.lt(60); side(size/3, level-1); } } function snowflake(size, level) { for (var i=0;i<3) { side(size, level); t.rt(120); } } function snow() { counter++; if (counter>500) { counter = 0; t.cs(); } t.setPos(Math.random()*600-300,Math.random()*600-300); snowflake(50*Math.random(),Math.floor(Math.random()*4)); active = setTimeout(snow,200); } t.setPenColor('#ffff00'); t.ht(); counter = 0; snow();

References

• http://www.mathcurve.com/fractals/koch/koch.shtml

The source code

function side(size, level) {
    if (level==0) {
        t.fd(size);
    } else {
        side(size/3, level-1);
        t.lt(60);
        side(size/3, level-1);
        t.rt(120);
        side(size/3, level-1);
        t.lt(60);
        side(size/3, level-1);
    }
}

function snowflake(size, level) {
    for (var i=0;i<3) {
        side(size, level);
        t.rt(120);
    }
}
t.ht();
function snow() {
   counter++;
   if (counter>500) {
      counter = 0;
      t.cs();
   }
   t.setPos(Math.random()*600-300,Math.random()*600-300);
   snowflake(30*Math.random(),Math.floor(Math.random()*4));
   active = setTimeout(snow,200);
}
t.setPenColor('#ffff00');
counter = 0;
snow();