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from tkinter import *
from random import *

#canvas
master = Tk()
canvas = Canvas( master, width=400, height=400, bg = "lightblue")
canvas.pack()

def btn_click():
    s = entry.get()
    x,y = 20, 150
    y_lower = y + 10
    farba = choice(['red','blue','green'])
    for j in range(len(s)):
                for i in s:
                        s_list.append(i)
                if j % 2 == 0:
            canvas.create_text(x,y, text = s_list[j],font = "Courier 15", fill = farba)
        else:
            canvas.create_text(x,y_lower, text = s_list[j],font = "Courier 15", fill = farba)
        x += 15


entry = Entry()
entry.pack()

btn = Button(text = "kresli", command = btn_click)
btn.pack()