Washer 1 Payter
10kg washer: Finished
  Washer 4
10kg washer: Sorry, I am not feeling well.
Washer 2 Payter
10kg washer: Taking a Nap 
Washer 3 Payter
10kg washer: Payment in progress
Washer 5 Payter
10kg washer: Available
Start payment
Dryer 1 Payter
10kg dryer: Paid
Dryer 2 Payter
10kg dryer: Available
Start payment
Dryer 3 Payter
10kg dryer: Available
Start payment
Dryer 4 Payter
10kg dryer: Available
Start payment
! Dryer 5 Payter
10kg dryer: Machine error