.wrapper { } .spinner { position: absolute; } .back { position: absolute; } combine = 1; stop_combining = 0; start_combining = 0; prev_angle = 0; var back = document.getElementsByClassName('back')[0]; var propeller2 = new Propeller(back, {speed: 0}); var spinner = document.getElementsByClassName('spinner')[0]; new Propeller(spinner, { speed: 0, onRotate: function() { var label = document.getElementById('angle'); label.innerHTML = this.angle.toFixed(2); var label = document.getElementById('combine_info'); label.innerHTML = "