Use the rotate attribute of css3 to rotate the angle Math.random(), set a setInterval to increase the angle of rotation, and turn off the timer after a certain period of time. At this time, the lottery is calculated based on the angle at which the picture stops.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
http://skill-map.stuq.org/ Refer to this picture and you should add some js code to meet the needs.
Use the rotate attribute of css3 to rotate the angle Math.random(), set a setInterval to increase the angle of rotation, and turn off the timer after a certain period of time. At this time, the lottery is calculated based on the angle at which the picture stops.