when i focus a element change element css

1  <input class="inputTag" type="text" value="">
2
3	//The input button must be placed at the top.
4	Otherwise the focus will not work .
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6  <h1 class="h1Tag">Safin</h1>
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8
9	.h1Tag {
10      background: gray;
11    }
12
13    .inputTag:focus+.h1Tag {
14      background: blue;
15    }
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19// My youtube:'https://www.youtube.com/HasibulIslambd' 
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