1) Click the timeline to add a new keyframe 2) Click the circle button to build your animation's css 3) Click the x button to delete the active keyframe Properties Base Style width: 250px; height: 250px; position: absolute; background-color: rgba(255,34,5,0.8); top: 50%; left: 50%; margin-top: -125px; margin-left: -125px; border-radius: 250px; Name Duration Timing Function Delay Iteration Count Di