dX = 0; dY = 0;
right now the Variables are set to 0 but I wan o give them a random number either -2, 0 or 2. I think that math.random() might work, but I don't know how to use it with negative numbers.
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1`dX = 4 * Math.random() - 2;`. `Math.random()` gives a number in the range `[0, 1[` (1 not included), so `4 * Math.random()` gives a number in the range `[0, 4[` and `4 * Math.random() - 2` gives you a number in the range `[-2, 2[` – ibrahim mahrir Jun 21 '20 at 12:36
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`0 <= Math.random() < 1` – ibrahim mahrir Jun 21 '20 at 12:40
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`4 * 0 <= 4 * Math.random <= 4 * 1` (multiply by 4) – ibrahim mahrir Jun 21 '20 at 12:40
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`0 <= 4 * Math.random() < 4` – ibrahim mahrir Jun 21 '20 at 12:41
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`0 - 2 <= 4 * Math.random() - 2 < 4 - 2` (subtract 2) – ibrahim mahrir Jun 21 '20 at 12:42
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**`-2 <= 4 * Math.random() - 2 < 2`** – ibrahim mahrir Jun 21 '20 at 12:42
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thanks. I realized that what I was searching doesn't quite work. I can only use -2,0,2 and no other numbers. But these numbers have to be chosen randomly every second. – Lelnus Jun 21 '20 at 12:59
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Ah! Then you can use [this formula](https://stackoverflow.com/a/1527834/9867451) like so: `dx = Math.floor(Math.random() * 5) - 2;` – ibrahim mahrir Jun 21 '20 at 14:42