Linkage for 180 deg. oscillation 1a

Input: green crank of full rotation.
Output: pink crank performing 180 deg. oscillation.
It is a combination of two four-bar linkages:
1. Green, yellow and orange parts.
2. Orange, blue and pink parts.
This feature cannot be achieved using only a four-bar linkage.
This video was made based on
https://youtu.be/EcHbRgAiSXY

STEP files of this video:
https://www.mediafire.com/file/bd06qf6t7r52e6r/Linkage180OscillationSTEP.zip/file
Inventor files of this video:
https://www.mediafire.com/file/kgirmakxkekj6h4/Linkage180OscillationInv.zip/file

Видео Linkage for 180 deg. oscillation 1a канала thang010146