Do not use chat GPT $?$

Do not use chat GPT $?$

I want to make a gate, install IR infrared sensor on it

$,$and connect it to an Arduino Mega. I want want some one help me to create a program in MATLAB Simulink that starts counting with seconds as soon as an object crosses it$,$ and then stops the counter and immediately when the object crosses it$,$ and starting a new counter countes with second and then stops the counter when object crosses it$.$

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Can someone write the code with the design in matlab simulink and provide the solution for me without using chat GPT $?$