Implementing a slow retractable landing gear

What would be the best way to implement a slow landing gear.

e.g. wenn i flip the gear switch to "UP" the corresponding channel changes its real value form 0%...80% in 10 seconds and then form 80%..100% in 3 seconds.

if i flip it back to "DOWN" the movement might be different as well e.g. 100%...50% in 5 seconds and then 50%..0% in 6 seconds...

Right now my FW-190 does move much to fast when it retracts the gear...

@vlad_vy

Thanks! Not perfect but does the job. at least my gear is moving slower now (partialy the machanics of the retracts do the speed change allready)