# Slow the turtle down

From JSXGraph Wiki

Jump to navigationJump to searchThis is an example, where the turtle speed is controlled by the setTimeout() method of JavaScript.

```
<jsxgraph width="500" height="500">
var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox: [-250, 250, 250, -250]});
var t = brd.create('turtle',[100,-50],{strokeOpacity:0.7,fillColor:'#ff8800',fillOpacity:0.2});
t.setPenSize(3);
function run(n) {
if (n>0) {
t.fd(20);
t.lt(90*(1-n/100));
var st = 'run(' + (n-1) + ')';
setTimeout(st,25);
}
}
```