HELP REVIEW MY ARDUINO UNO SKETCH FOR A MONITOR USING LM35 AND KY039

Projects General Guidance
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And should I remove the delays?

Some links to methods for timing without delay().

https://forum.arduino.cc/index.php?topic=223286.0

https://forum.arduino.cc/index.php?topic=503368.0

https://www.arduino.cc/en/Tutorial/BlinkWithoutDelay