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<h1 id="turnBlack">Off</h1>
<h1 id="turnWhite">On</h1>
<script>
var turnBlackButton = document.getElementById("turnBlack")
var turnWhiteButton = document.getElementById("turnWhite")
function turnBlack() {
document.body.style.background = 'black'
turnBlackButton.style.color = 'white'
turnWhiteButton.style.color = 'white'
}
function turnWhite() {
document.body.style.background = 'white'
turnBlackButton.style.color = 'black'
turnWhiteButton.style.color = 'black'
}
turnBlackButton.onclick = turnBlack
turnWhiteButton.onclick = turnWhite
</script>
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