Objective:

Design a pneumatic circuit for a machine that performs the following cylinder sequence upon pressing a push button:

Sequence:

A+ → B+ → A− → B−

Sequence Explanation:

A+ (Cylinder A extends):

Upon pressing the push button, Cylinder A is actuated and moves to its extended position.

B+ (Cylinder B extends):

Once Cylinder A reaches its fully extended position (A+), Cylinder B is actuated and moves to its extended position.

A− (Cylinder A retracts):

After Cylinder B is fully extended (B+), Cylinder A retracts to its initial position.

B− (Cylinder B retracts):

Once Cylinder A is fully retracted (A−), Cylinder B retracts to its initial position.