Tween
The Tween extension allows you to make movement smooth and nice.
Tween Property Block
Tweens a specific property (like x position, y position, angle, size) to a value over time, with an ease you select.
Tween Value Block

Tweens a specified value to another value over time, with an ease you select, and an option to wait or not wait until the tween ends.
This block must be used with the current tween value block, as the blocks inside will be looped until the tween ends. For example, by doing say (current tween value).