#!/usr/bin/python3
# -*- coding: utf-8 -*-


import os, sys, termios, tty, time, random
from math import sin, cos, sqrt
from time import sleep


termsize_xy = os.get_terminal_size()
xmax = termsize_xy[0] - 1
ymax = termsize_xy[1]

tree = "🌳"
frequency = int(xmax / 5)
street = tree
for i in range(0, frequency):
    street += " "
street += tree
streetwidth = len(street)
amplitude = (xmax - streetwidth*4) / 3
streetpos = amplitude
pi = 3.1416
deg2rad = pi / 180
toggle = 1
maxpos = xmax - streetwidth
maxamp = xmax - streetwidth / 3


def curpos(x, y):
    print("\033[%d;%dH" % (y, x), end="", flush=True)


while True:
    sleep(0.01)
    amplitude += toggle
    frequency = frequency + toggle
    streetpos = int(sin(frequency * deg2rad) * cos(frequency * deg2rad + 1) * amplitude + streetwidth*4)
    frequency += toggle
    curpos(streetpos, ymax)
    print(street)
    if amplitude >= maxamp or amplitude < 3:
        toggle *= -1


sys.exit("Schulz nun.")