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Less than Gate example

Required Blocks - Fluid Metre, Light Source, Toggle Button.

(For teaching and demonstration purposes) - This works because the AND gate requires both inputs to be an ON signal before it can give an ON signal output. For the less than gate, input A must be less than input B for the less than gate to output an ON signal, the moment the number on input A becomes a larger number than input B, the less than gate will shut off releasing an OFF signal turning off the AND gate killing the lights, no matter how much you spam the toggle button on the other side of the lights.