This is four days on, four days off, twelve hour shifts. So:
Monday : 6 AM to 6PM
Tuesday : 6 AM to 6PM
Wednesday : 6 AM to 6PM
Thursday : 6 AM to 6PM
Friday : OFF
Saturday : OFF
Sunday : OFF
Monday : OFF
Tuesday : 6 PM to 6AM
Wednesday : 6 PM to 6AM
Thursday : 6 PM to 6AM
Friday : 6 PM to 6AM
Saturday : OFF
Sunday : OFF
Monday : OFF
Tuesday : OFF
Repeat
Monday : 6 AM to 6PM
Tuesday : 6 AM to 6PM
Wednesday : 6 AM to 6PM
Thursday : 6 AM to 6PM
Friday : OFF
Saturday : OFF
Sunday : OFF
Monday : OFF
Tuesday : 6 PM to 6AM
Wednesday : 6 PM to 6AM
Thursday : 6 PM to 6AM
Friday : 6 PM to 6AM
Saturday : OFF
Sunday : OFF
Monday : OFF
Tuesday : OFF
Repeat