var everyFrame=function()
{
skyRed=skyRed+1;
skyGreen=skyGreen-0.3;
skyBlue=skyBlue-0.7;
orangeFishMoveDown=orangeFishMoveDown+0.025;
orangeFishMoveRight=orangeFishMoveRight+.05;

sky.style.backgroundColor='rgb('+skyRed+','+skyGreen+','+skyBlue+')';
orangeFish.style.top=orangeFishMoveDown+'px';
orangeFish.style.left=orangeFishMoveRight+'px';
};

window.setInterval(everyFrame, 33);