화성땅 뼈대준비에서 실행 했는데 오류가 뜹니다

from flask import Flask, render_template, request, jsonify
app = Flask(__name__)



@app.route('/')
def home():
return render_template('index.html')

@app.route("/mars", methods=["POST"])
def web_mars_post():
sample_receive = request.form['sample_give']
print(sample_receive)
return jsonify({'msg': 'POST 연결 완료!'})

@app.route("/mars", methods=["GET"])
def web_mars_get():
return jsonify({'msg': 'GET 연결 완료!'})

if __name__ == '__main__':
app.run('0.0.0.0', port=5000, debug=True)

/Users/9mean2/Desktop/Sparta/projects/mars/venv/bin/python /Users/9mean2/Desktop/Sparta/projects/mars/app.py 

 File "/Users/9mean2/Desktop/Sparta/projects/mars/app.py", line 17

  return render_template('index.html')

  ^

IndentationError: expected an indented block

종료 코드 1(으)로 완료된 프로세스