$ java RunGasStation
GasStation: tank sz 2, 2 cars (2 std), 1 pumps; 30 evts, seed 525, mx sleep 10ms
cust. 1: pays for:     2 units
cust. 1: pump started: 2 units, @pump 0
cust. 1: receives gas: 2 units, @pump 0
cust. 1: drives 
cust. 2: pays for:     2 units
cust. 2: pump started: 2 units, @pump 0
cust. 2: receives gas: 2 units, @pump 0
cust. 2: drives 
cust. 2: drives 
cust. 1: pays for:     1 units
cust. 1: pump started: 1 units, @pump 0
cust. 1: receives gas: 1 units, @pump 0
cust. 1: drives 
cust. 1: drives 
cust. 2: pays for:     1 units
cust. 2: pump started: 1 units, @pump 0
cust. 2: receives gas: 1 units, @pump 0
cust. 1: pays for:     1 units
cust. 1: pump started: 1 units, @pump 0
cust. 1: receives gas: 1 units, @pump 0
cust. 1: drives 
cust. 2: pays for:     1 units
cust. 2: pump started: 1 units, @pump 0
cust. 2: receives gas: 1 units, @pump 0
cust. 2: drives 
cust. 1: pays for:     1 units
cust. 1: pump started: 1 units, @pump 0
cust. 1: receives gas: 1 units, @pump 0
cust. 1: drives 
cust. 2: pays for:     1 units
GasStation simulation terminated after 30 events

$ java RunGasStation
GasStation: tank sz 2, 2 cars (2 std), 1 pumps; 30 evts, seed 433, mx sleep 10ms
cust. 1: pays for:     2 units
cust. 1: pump started: 2 units, @pump 0
cust. 1: receives gas: 2 units, @pump 0
cust. 2: pays for:     2 units
cust. 1: drives 
cust. 2: pump started: 2 units, @pump 0
cust. 2: receives gas: 2 units, @pump 0
cust. 2: drives 
cust. 1: pays for:     1 units
cust. 1: pump started: 1 units, @pump 0
cust. 1: receives gas: 1 units, @pump 0
cust. 2: pays for:     1 units
cust. 2: pump started: 1 units, @pump 0
cust. 1: drives 
cust. 2: receives gas: 1 units, @pump 0
cust. 2: drives 
cust. 1: pays for:     1 units
cust. 1: pump started: 1 units, @pump 0
cust. 1: receives gas: 1 units, @pump 0
cust. 2: pays for:     1 units
cust. 1: drives 
cust. 2: pump started: 1 units, @pump 0
cust. 1: drives 
cust. 2: receives gas: 1 units, @pump 0
cust. 2: drives 
cust. 1: pays for:     1 units
cust. 2: drives 
cust. 1: pump started: 1 units, @pump 0
cust. 1: receives gas: 1 units, @pump 0
cust. 2: pays for:     1 units
GasStation simulation terminated after 30 events

$ java RunGasStation 4
GasStation: tank sz 4, 2 cars (2 std), 1 pumps; 30 evts, seed 369, mx sleep 10ms
cust. 1: pays for:     1 units
cust. 1: pump started: 1 units, @pump 0
cust. 1: receives gas: 1 units, @pump 0
cust. 2: pays for:     1 units
cust. 2: pump started: 1 units, @pump 0
cust. 2: receives gas: 1 units, @pump 0
cust. 1: pays for:     1 units
cust. 2: drives 
cust. 1: pump started: 1 units, @pump 0
cust. 1: receives gas: 1 units, @pump 0
cust. 2: pays for:     1 units
cust. 1: drives 
cust. 2: pump started: 1 units, @pump 0
cust. 1: drives 
cust. 2: receives gas: 1 units, @pump 0
cust. 1: pays for:     2 units
cust. 1: pump started: 2 units, @pump 0
cust. 1: receives gas: 2 units, @pump 0
cust. 2: pays for:     1 units
cust. 1: drives 
cust. 2: pump started: 1 units, @pump 0
cust. 1: drives 
cust. 2: receives gas: 1 units, @pump 0
cust. 2: drives 
cust. 2: drives 
cust. 1: pays for:     3 units
cust. 1: pump started: 3 units, @pump 0
cust. 1: receives gas: 3 units, @pump 0
cust. 2: pays for:     4 units
cust. 1: drives 
GasStation simulation terminated after 30 events