var array 17 -4 24 100 -67 33 11 20 51 -350 var root value undefined l

var array = [17, -4, 24, 100, -67, 33, 11, 20, 51, -350];

var root = {
	value: undefined,
	left: undefined,
	right: undefined,
	deep: 0
}

function add(val) {
	if (root.value === undefined) {
		root.value = val;
		return;
	}
	var currentNode = root;
	while (true) {
		if (val > currentNode.value) {
			if (currentNode.right === undefined) {
				currentNode.right = {
					value: val,
					left: undefined,
					right: undefined,
					deep: currentNode.deep + 1
				}
				return currentNode.right;
			}
			currentNode = currentNode.right;
		} else {
			if (currentNode.left === undefined) {
				currentNode.left = {
					value: val, 
					left: undefined,
					right: undefined,
					deep: currentNode.deep + 1
				}
				return currentNode.left;
			}
			currentNode = currentNode.left;
		}
	}
}

function printTree() {
    var levels = [''];
    var currentDeep = 0;
	var queue = [root];
	while (queue.length > 0) {
		var currentNode = queue.shift();
		if (currentNode === undefined) {
		    levels[currentDeep] += 'u ';
		    continue;
		}
		currentDeep = currentNode.deep;
		if (!levels[currentDeep]) {
		    levels[currentDeep] = '';
		}
		levels[currentDeep] += currentNode.value + ' ';
		queue.push(currentNode.left);
		queue.push(currentNode.right);
	}
	for (var i = 0; i < levels.length; i++) {
	    console.log(levels[i]);
	}
}

add(array[0]);
for (var i = 1; i < array.length; i++) {
    add(array[i]);
}
printTree();