PID controller for heating chamber

This is the code for a simple device that can control the temperature inside a hot chamber, ideally for a 3D printer. It works with an arduino (any type should work).

https://youtu.be/xTOFt23Ags4

the outputs are:
1pin for the temp control (basically the control pin for a SSR)
3pins for a addressible LED strip (if you want to add light)

the inputs are
POWER (5V + GND)
Temp sensor
potentiometer
PCB push switch


You will need the following:
-Arduino (UNO, NANO, Pro Micro...)
-