let arr = [0]
arr.push(1) arr.push(2) arr.push(3) arr.push(4) arr.push(5) arr.push(6) arr.push(7) arr.push(8) arr.push(9) arr.push(10) arr.push(11)
arr = arr.concat(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11)