This patch adds 5th mode to Time offset modifier, which should allow to create time segments list. This will allow users to chain together multiple time ranges in 4 modes: - Forward - Backwards - Pingpong - Reverse Pingpong It also comes with additional Repeat parameter which specifies number of times particular segment should run. The mechanic of it is transforming initial parameters into array of frames which are mapped to existing cfra (current frame) value. Prototype : https://jsfiddle.net/ha2sjw8p/3/ This is also closely aligned to community request: https://blender.community/c/rightclickselect/Txhbbc/ This should allow creation of complex animations like dancing, which consists of repeating loops and transitions to the next. One important side effect of this is dramatically reduced file sizes, as user no longer needs to copy paste keyframes. Reviewed By: antoniov, mendio, pepeland Differential Revision: https://developer.blender.org/D15052