A bad YAML file... please help me fix it!

bad_yaml.yml

name:Validate Data

on:
  push: pull_request:

jobs:
  validate-data:
    runs-on:ubuntu-latest
    steps:
    	- uses:actions/checkout@v2

      - uses: actions/setup-node@v2
        with:
          node-version: "12"

    	- name: Validate workflows   run: |
          npm ci
          npx ts-node-script ./index.ts
        working-directory: ./script/validate-data

name : Validate Data

on :
push : pull_request
jobs
validate-data
runs-on:ubuntu-latest
steps
- uses actions/checkout@v2

    - uses  actions/setup-node@v2
       with 
       node-version  "12"

	- name  Validate workflows   
        run  |
            npm ci
            npx ts-node-script ./index.ts
    working-directory  ./script/validate-data

---
name: Validate Data
on:
  push: null
  pull_request: null
jobs:
  validate-data:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-node@v2
        with:
          node-version: "12"
      - name: Validate workflows
        run: |
          npm ci
          npx ts-node-script ./index.ts
        working-directory: ./script/validate-data