docs: function(type, pos, dim, canvas){
        var ctx = canvas.getCtx(), 
            c1x = pos.x, 
            c1y = pos.y - dim, 
            c2x = c1x - dim, 
            c2y = pos.y + dim, 
            c3x = c1x + dim, 
            c3y = c2y;
        ctx.beginPath();
        ctx.moveTo(c1x, c1y);
        ctx.lineTo(c2x, c2y);
        ctx.lineTo(c3x, c3y);
        ctx.closePath();
        ctx[type]();
      }