Moving 1 Picture in a Programm - How to?

[lucasvfxdood at gmail.com]

Hey Guys! I need your help!
So i want to make a programm like the app called "Feed Me"
There are 2 Pictures (I got that) than you can click the food picture and drag it on the boys mouth and than the sad boys face disappears and a happy face shows up.

Heres the code ive wrtiten
from tkinter import * 
f = Tk()
f.title('Give the boy the apple.')
f.geometry('500x500')
c = Canvas(master=f,width=500,height=500,bg='white')
c.place(x=0,y=0)
p = PhotoImage(file='traurigsmiley.png') #sad smiley
i = c.create_image(250,320,image=p) #position
p2 = PhotoImage(file='essen.png') #food
i2 = c.create_image(70,100,image=p2)
f.geometry('500x500')
f.mainloop()


Please Help!