#import library
from tkinter import *
import serial

#open desired port

port_1=serial.Serial("/dev/cu.usbserial-10IP0218",9600)

#define button press functions

def button1():
	port_1.write(b'1')

def button2():
	port_1.write(b'2')


root =Tk()
root.geometry("500x500")
root.title("color change")
canvas = Canvas(root, width=300, height=300)
canvas.place(x=100,y=100)
canvas.pack()

B1 = Button(root,text="RED",command=button1)
B1.pack()
B1.flash()

B2 = Button(root,text="GREEN",command=button2)
B2.pack()
B2.flash()

root.mainloop()