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const newArray = deepCopy(coordinates)
newArray.splice(3, 1,
{position1: {x: 7, y: 7}, position2: {x: 7, y: 7}, position3: {x: 7, y: 7}},
{position1: {x: 8, y: 8}, position2: {x: 8, y: 8}, position3: {x: 8, y: 8}}
)
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