In friction, you can use the current frame number through expresions to create quickly and without any keyframe simple animations.

• Create a square to animate its rotation
• Open the expression editor by right clicking the rotation property
• In the Binding section, create a named variable for the $frame scene attribute : current_frame=$frame
• In the Calculate section, return this variable for friction to use it as Rotation value : return current_frame
• The square is now rotationg without any keyframe
• In the expression editor, speed up the rotation by multiplying the frame value with a number : return current_frame*100
• To control the rotation speed, use a custom property (dummy user-created properties), create a Speed property (activate layer's Custom Property through right-click menu, then add a single value property)
• Use it in the expression editor by binding it to a variable : speed=properties.speed
• Then use this variable as the multiplier in the Calculate section : return current_frame*speed
• You can now change the speed through this property !

Do you know friction ? It is an awesome open source 2d animation software, early stage, which could replace after effect

Unofficial discord https://discord.gg/FkjnM2r2JD Official page https://friction.graphics/