LED, push button and analog values ain't working they way it should

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hello

i trying create small system allow me turn led on push button , keep on until oush again, ''tricky part'' want go high analog value coming variable resistor.

reading resistor value = no problem

lighting led analog value , coping debounce = stuck

can me on way, telling take specially care of? 

the circuit in place, can't work out code

please help

what have code far?


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