Hardware: Using the light sensor and a button to control three different LEDs.

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$//$ Problem Statement: Build an Arduino project that uses the Light sensor and a button switch

$//$ to control three LEDs. If the Light sensor shows dark $$ light the Green LED. If the button

$//$ is pushed $$ light the Red LED. If both the Light sensor reads dark and the button is pushed

$//$ light the blue LED and play a $2\mathrm{.}5$ kHz tone.

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$//****$ Pseudocode Algorithm $****$

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$//$ create a global integer variable LED$\_$OnTime $=200$ msec

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$//$ setup$()$

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$//$ set pin $4$ as input for button with a pullup resistor

$//$ set pin $6$ as input for Light sensor

$//$ set pin $8$ as output for Green LED

$//$ set pin $9$ as output for Red LED

$//$ set pin $10$ as output for Blue LED

$//$ set pin $12$ as output for the buzzer$/$speaker

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$//$ loop$()$

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$//$ if $($ Light sensor $==$ dark $)$

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$//$ Turn on Green LED for LED$-$On$-$time $($use variable$)//$

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$//$ if $($ button $==$ pushed $)$

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$//$ Turn on Red LED for LED$-$On$-$time $($use variable$)$

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$//$ if $($ Light sensor $==$ dark && button $==$ pushed $)//$ compound conditional

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$//$ Turn on Blue LED for LED$-$On$-$time $($use variable$)$

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