[FIXED] Fix textures from "shrinking"

Hello everyone! I am making a game and I need to know how I can fix a this with my textures:
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When I make it smaller on one side it makes it blurry and it doesn’t look good. I would like it to kinda cut a peice out of the texture and use that instead. So do anyone know how I can fix this? And sorry if I can’t explain it very well. I am not English.

Search for UV maps on google, they are used to map your texture onto the object.