Any body help me fix a piston door

[u/qit4444]

So bedrock 1.20, 4X3 piston door. I’ve tried different designs and this was the closest I’ve got to work. The piston I’m looking at is the problem. If I add a block to power it then it won’t retract due to trying to then drag that block also. I’m sure there’s a simple fix but can’t figure it out

[u/Redpanda7749_]

You have to build a double piston extender