The yellow gear (radius r2 = 30) is fixed to the connecting rod.
The green gear (radius r1 = 60) is not fixed to the pink input crank.
Crank length: R = 60
Connecting rod length: L = 70
(r1 longer than L – R)
The green output gear irregularly rotates (with going back) 2 revolutions when the pink crank rotates 1 revolution in the opposite direction.