Source: https://en.wikipedia.org/wiki/UML_state_machine

Additional Information:

• Finite State Machine: https://en.wikipedia.org/wiki/Finite-state_machine
• State Diagram: https://en.wikipedia.org/wiki/State_diagram

• Dũng Trần Đăng: Building a State Machine to Multitask with Arduino!
• ItKindaWorks: How to multi-task on an Arduino

Connect a potentiometer to A0. Use the function valRange = map(…) to map the raw potentiometer values to the integer numbers 0..9 . The variable varRange can acquire these 10 different values.