JSFiddle - React, Tailwind, and code Playground

JavaScript

var mapSize = 10;
var map = [];
for (var x = 0; x < mapSize; x++) {
    map[x] = [];
    for (var y = 0; y < mapSize; y++) {
        map[x][y] = 0
        };
    };
//Make square room within map
var roomSize = 3;
var roomType = "Kitchen"
var paintRoom = function(mapX, mapY) {
    for (var j = 0; j < roomSize; j++) {
      map[mapX + j][mapY] = roomType;
      for (var k = 0; k < roomSize; k++) {
         map[mapX + j][mapY + k] = roomType;
      }
    };
};
paintRoom(3, 4);
console.log(map);