How to return a random gif from a list with Python requests

I'm using a web server on PythonAnywhere to run a Flask application. All I'm looking to do is randomly output a gif from a list of URLs. I'm looking to utilize the requests library, and I suspect I need the render_template in order to actually pass the image over. I have been dealing with either view function TypeErrors or outputs of plain text to a URL. I've also incorporated PIL and shutil once or twice but to no functional success. Thank you for any help or tips.

from flask import Flask, render_template

import random
import requests

app = Flask(__name__)

WELCOME_LIST = [
  'https://cdn.discordapp.com/attachments/891856529928622080/891865614870806568/rgb.gif'
  'https://cdn.discordapp.com/attachments/891856529928622080/891865655542964224/racing.gif',
  'https://cdn.discordapp.com/attachments/891856529928622080/891897881550802954/comet.gif',
  'https://cdn.discordapp.com/attachments/891856529928622080/891897942678581278/harujion.gif',
  'https://cdn.discordapp.com/attachments/891856529928622080/891898027126698045/letter.gif',
  'https://cdn.discordapp.com/attachments/891856529928622080/891898085909864479/encore.gif',
  'https://cdn.discordapp.com/attachments/891856529928622080/891898143627677786/gunjou.gif',
  'https://cdn.discordapp.com/attachments/891856529928622080/891898187240050718/haruka.gif',
  'https://cdn.discordapp.com/attachments/891856529928622080/891898241900236830/monster.gif',
  'https://cdn.discordapp.com/attachments/891856529928622080/891898276339646474/probably.gif',
  'https://cdn.discordapp.com/attachments/891856529928622080/891898352617259028/taisho.gif',
  'https://cdn.discordapp.com/attachments/891856529928622080/891898425342316624/tracing.gif',
]

@app.route('/')

def obtainGif():
    gif = random.choice(WELCOME_LIST)
    response = requests.get(gif)
    return response.raw

@app.route('/join')

def output():
    finalize = obtainGif
    return render_template('home.html', finalize=finalize)

if __name__ == '__main__':
    app.run(host='0.0.0.0')