Using multiple TM1637 displays

Hello, I am new here so I don’t know if this question belongs here. If not I’m sorry.

For a schoolproject I working on a fully automatic rain barrel with: temperature, time, electric water valve, water level meter (using a ultrasonic) + there must be a possibility to set the water level. I am using an Arduino Mega 2560 because the control unit must be able to control 6 different rain barrels. To control the water level I use 6 potmeters. And to see how much you want to keep in the each rain barrel I use 6 TM1637.

At the moment I have no idea how to program multiple displays. Can someone help me please?