テスト
段落など
script>
var randomimage = [];
randomimage[0] = 'https://imgur.com/Mxuz5UZ.jpg';
randomimage[1] = 'https://imgur.com/UG2gRr1.jpg';
randomimage[2] = 'https://imgur.com/jIEUzQY.jpg';
var n = Math.floor(Math.random()*randomimage.length);
document.getElementById('1').style.background='url("'+randomimage[n]+'") center center /cover no-repeat';/script>
