This JS only works on a website or web page with a small URL.
I made this one, combining A lot of stuff we have seen: Check it out!
javascript:alert('Welcome to ultimate webpage editor');void(document.body.style.fontFamily=prompt("Type a Font my dudes",""));void(pJ83EnR7=prompt('Color...',''));if(pJ83EnR7!=''){if(frames.length>0){for(xN3At2nF=0;xN3At2nF<frames.length;xN3At2nF++){void(frames[xN3At2nF].document.fgColor=pJ83EnR7)}}else{void(document.fgColor=pJ83EnR7)}}else{void(null)};void(document.body.style.backgroundColor=prompt("Type a colour for the backround my dudes",""));alert('Now I will open up a webpage editor to finish it off');function rotateit(x){x=parseInt(x);document.body.setAttribute('style',' -moz-transform: rotate('+x+'deg); -moz-transform-origin: 50% 50%; -webkit-transform: rotate('+x+'deg); -webkit-transform-origin: 50% 50%; -o-transform: rotate('+x+'deg); -o-transform-origin:50% 50%; -ms-transform: rotate('+x+'deg); -ms-transform-origin: 50% 50%; transform: rotate('+x+'deg); transform-origin: 50% 50%;');}for(i=0;i<=360;i++){setTimeout("rotateit("+i+")",i*40);}void(0);document.body.contentEditable='true';document.designMode='on';void 0