Some democode routines (will be updated from time to time)

democode.js

//bytebeat: beat(pattern,length)
beat=function(b,e,a,t){return(a="data")+":audio/wav;base64,UklGRl9fX19XQVZFZm10IBAAAAABAAEAQB8AAEAfAAABAAgA"+btoa(eval("for(t=0;++t<e*8e3;)a+=String.fromCharCode(255&("+b+"))"))}
//bytebeat with math: beatm(pattern,length)
beatm=function(b,e,a,t){return(a="data")+":audio/wav;base64,UklGRl9fX19XQVZFZm10IBAAAAABAAEAQB8AAEAfAAABAAgA"+btoa(eval("with(Math)for(t=0;++t<e*8e3;)a+=String.fromCharCode(255&("+b+"))"))}
//konamicode: konami(callback)
konami=function(k,c){onkeyup=function(e){/113302022928$/.test(c+=[e.which-37])&&k()}}
//circle gesture detection: circgest(callback[, clockwiseflag])
//clockwiseflag: 1 - counterclockwise, 0 or absent - clockwise
circgest=function(f,a,v,i,c,o){c=v="";addEventListener("mousemove",function(e){o&&(i=2*(e.screenX>o.screenX)+(e.screenY>o.screenY),i^c&&(v+=i,c=i),(a?/3201$/:/2310$/).test(v)&&(f(),v=""));o=e},0)}

//favtro: favupdate(canvas[, linkelement])
favupdate=function(f,i){i=i||document.querySelector('link[rel*="icon"]');if(!i)with(document)i=createElement("link"),i.rel="icon",head.appendChild(i);i.href=f.toDataURL();return i}
//console image output: console.img(url,width,height)
console.img=function(c,w,h){console.log("%c ","font-size:1px;padding:"+(h>>1)+"px "+(w>>1)+"px;line-height:"+h+"px;background:url("+c+");background-size:"+w+"px "+h+"px")}
//console canvas graphics: console.draw(canvas);
console.draw=function(c){console.img(c.toDataURL(),c.width,c.height)}
//console asciiart: console.ascii(canvas); - up to 255x255
console.ascii=function(x,e,n,o,s){x=x.getContext("2d").getImageData(n=0,0,e=x.width,x.height).data,s="",o=[];for(e*=4;n in x;n++)s+="%c "+((n+4)%e?"":"\n"),o.push("background-color:rgba("+[x[n],x[++n],x[++n],x[++n]]+")");o.unshift(s);console.log.apply(console,o)}
//console random image data URI asciiart: console.imgascii(url) - up to 255x255
console.imgascii=function(u,f,o){f=new Image;f.onload=function(){o=document.createElement("canvas"),o.width=f.width,o.height=f.height,o.getContext("2d").drawImage(f,0,0);console.ascii(o)},f.src=u}

//speech synthesis using Web Speech API
//usage: speak(phrase[, language])
//if language is omitted, english is used
speak=function(s,l,u,v,i){l=l||"english";for(u=new SpeechSynthesisUtterance(s),v=speechSynthesis.getVoices(),i=v.length;i;)if(~v[--i].name.toLowerCase().indexOf(l.toLowerCase())){u.voice=v[i];speechSynthesis.speak(u);break}}