just copy and paste below codes in browser url address bar, hit go button or enter and see the fun

javascript:R=-1;DI=document.links;DIL=DI.length;function A(a,b,c){return Math.sin(R/350*6.28*b+a)*c+c}function B(a){DIS=DI.item(a).style;DIS.position=’absolute’;DIS.left=A(5,100,500);DIS.top=A(5.6,60,150)}setInterval(’R++;B(R%DIL)’,15);void(0)