# turtle_makingwaves.py

# turtle_makingwaves.py

from turtle import*
from math import*

screen = Screen()
speed(0)

def waveform(wlen, amp, iter, xcor, ycor, phase):
    for i in range(400):
        y= amp*sin(iter+phase)
        x= wlen*iter/(2*pi)
        goto(x+xcor,y+ycor)
        iter+=0.1

setup(width = 500, height = 500, startx =200, starty =200)
bgcolor('lightblue')
pensize(3)
pencolor('blue')

up()
xc=-300
yc=-210
goto(xc,yc)
down()

for z in range(18):
    waveform(100,10,0.1,xc,yc,pi/2)
    up()
    yc+=30
    goto(xc,yc)
    down()

    ht()