Melihat formula pada cell dengan Ctrl+` ~ kamu bisa

makecircle = function(){ // rotation/positioning if(init.nopy){ o.style.top = (b || document.body).scrollTop + 'px'; o.style.left = (b || document.body).scrollLeft + 'px'; }; currStep -= rotation; for (var d, i = n; i > -1; --i){ // makes the circle d = document.getElementById('iemsg' + i).style; d.top = Math.round(y[i] + a * Math.sin((currStep + i) / letter_spacing) * circleY - 15) + 'px'; d.left = Math.round(x[i] + a * Math.cos((currStep + i) / letter_spacing) * circleX) + 'px'; }; }, drag = function(){ // makes the resistance y[0] = Y[0] += (ymouse - Y[0]) * speed; x[0] = X[0] += (xmouse - 20 - X[0]) * speed; for (var i = n; i > 0; --i){ y[i] = Y[i] += (y[i-1] - Y[i]) * speed; x[i] = X[i] += (x[i-1] - X[i]) * speed;