You are to build a program to complete the following tasks:

• Your system is to start upon pressing a momentary push button (device PB001)
• Your system is to stop upon pressing a momentary push button (device PB002), OR upon completion of the operational cycle
• Upon starting, the following is to take place:
  • Step 1: 180 second duration
    • Water fill valve is to be open (device MOV001)
    • Discharge valve is to be closed (device MOV002)
    • Fill lamp is to light (device PL001)
    • Discharge lamp is to remain unlit (device PL002)
    • Mixing motor forward is to remain disengaged (device MM001)
    • Mixing motor reverse is to remain disengaged (device MM002)
    • Mixing lamp is to remain unlit (device PL003)
  • Step 2: 2 second duration
    • Water fill valve is to be closed
    • Discharge fill valve is to be closed
    • Fill lamp is to be unlit
    • Discharge lamp is to be unlit
    • Mixing motor forward is to remain disengaged
    • Mixing motor forward is to remain disengaged
    • Mixing lamp is to remain unlit
    • Soap valve is to open (device MOV003)
    • Soap light is to light (PL004)
  • Step 3: 2 second duration
    • All valves are to remain closed and associated lights unlit
  • Step 4: 1 second duration
    • All valves remain closed and associated lights unlit
    • Mixing motor forward engages
    • Mixing motor reverse is disengaged
    • Mixing light is to light
  • Step 5: 1 second duration
    • All valves remain closed and associated lights unlit
    • Mixing motor forward is disengaged
    • Mixing motor reverse is engaged
    • Mixing light is to light
  • Steps 6 through 26
    • Repeat steps 4 and 5, alternating each second
  • Step 27: 120 second duration
    • Water valve remains closed and associated light unlit
    • Discharge valve opens and associate light lit
    • Soap valve remains closed and associated light unlit
    • Mixing motor forward is engaged
    • Mixing light is to light
  • Step 28: 180 second duration
    • Repeat step 1
  • Steps 29 through 79
    • Repeat steps 4 and 5, alternating each second
  • Step 80: 120 second duration
    • Repeat step 27
  • Step 81: 1 second duration
    • Reset all functions and stop the process entirely