help with game

[hammza]

hi every one

I'm trying to make a game , i need help to make the bullet start from the ship

i don't know how to use coords

this is the code

from tkinter import *
import random
import time

WIDTH=600
HEIGHT=400

tk=Tk()
c=Canvas(tk,width=WIDTH,height=HEIGHT)
c.pack()



def ship(a):
    c.create_polygon(a,a/2,a-20,a/2+30,a+20,a/2+30,fill="blue")
    return a


def bullet(i):
    c.create_oval(i,i,i+5,i+5,fill="blue")


#=================== KEYS =====================================
def go_left(event):
    c.move(1,-5,0)
    c.update()

def go_right(event):
    c.move(1,5,0)
    c.update()

def go_up(event):
    c.move(1,0,-5)
    c.update()

def go_down(event):
    c.move(1,0,5)
    c.update()

def spaceKey(event=0):
    c.move(2,0,-100)
    c.update()


ship=ship(300)
bult=bullet(298)

tk.bind("<Left>", go_left)
tk.bind("<Right>", go_right)
tk.bind("<Up>", go_up)
tk.bind("<Down>", go_down)
tk.bind('<space>',spaceKey)


tk.mainloop()