JSFiddle - React, Tailwind, and code Playground

JavaScript

var image;
function newImage(){
	image = {};
	var temp = {}
	for(i=0;i!=250;i++){
		temp[i] = {};
	}
	image = temp;
	for(i=0;i!=250;i++){
		image[i] = temp;
	}
}
newImage()
console.log(image)