/* Web workers demo:
    n balls attracting each other
    each planet uses its own web-worker to compute its moving.
    computations take place every 1/1000 sec
    canvas displays results with 25 pictures / sec
    
    (I did not investigate yet if this solution is betterer than a purelysequential
    sequential one. Also the approximation is not really good. The system
    seem to heat-up by collisions.)
    
    Autor: Klaus Birkenbihl, ict-Media-GmbH
    */ 
  html, body {
    height: 100%;
	  padding: 0px;
	  margin: 0px;
	}
  
	body {
	  font-family: sans-serif;
	  font-size: 200%;
	  color: white;
	  background: black;
	  background-position: top left;
	  background-attachment: fixed;
	  background-repeat: no-repeat;
    /* position: relative; */
	  width: 100%;
	}

canvas {
  padding: 0px; 
  border-color: #808080; 
  margin: 0px; 
  position: absolute;
}

#title{
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 1;
  width: 30em;
}