【html(直接css)】
<div style="position:relative; background-image: linear-gradient(0deg, #bd9 20px,#dfb 20px); margin:10px 20px; padding:20px 20px 30px 20px;">下が丸まった紙に書く文章<div style="position:absolute; bottom:0; left:-20px; display:block; width:40px; height:40px; background-color:#bd9; border-radius:50%;"></div><div style="position:absolute; bottom:20px; left:-20px; display:block; width:40px; height:20px; background-image: linear-gradient(90deg, #fff 50%,#dfb 50%);"></div><div style="position:absolute; bottom:0; right:0; display:block; width:20px; height:20px; background-color:#fff;"></div><div style="position:absolute; bottom:0; right:0; display:block; width:40px; height:40px; background-color:#dfb; border-radius:50%;"></div></div>