Edit in JSFiddle

<div id="pti-flag">
    <div class="green-strip"></div>
    <div class="red-strip"></div>
    <div id="cover">
        <div id="crescent-moon">
        </div>
        <div id="star"></div>
    </div>
</div>

body {
    margin: 30px;
    background: #efefef;
}
#pti-flag {
    position: relative;
    width: 360px;
    height: 240px;
}
.green-strip {
    background: #008000;
    height: 120px;
}
.red-strip {
    background: #FF0000;
    height: 120px;
}
#cover {
    position: absolute;
    top: 0;
    width: 358px;
}
#crescent-moon {
    width: 145px; 
    height: 145px; 
    border-radius: 50%; 
    -ms-box-shadow: 17px 17px 0 0 #fff;
    -o-box-shadow: 17px 17px 0 0 #fff;
    -webkit-box-shadow: 17px 17px 0 0 #fff;
    box-shadow: 17px 17px 0 0 #fff;
    -ms-transform: rotate(100deg); /* IE 9 */
    -webkit-transform: rotate(100deg); /* Chrome, Safari */ 
    -o-transform: rotate(100deg);
    transform: rotate(100deg);
    margin: 30px 0 0 120px;
}
#star:before {
    content: "\2605";
    color: #fff;
    font-size: 4em;
    left: 173px;
    position: absolute;
    top: 50px;
    -ms-transform: rotate(50deg); /* IE 9 */
    -webkit-transform: rotate(50deg); /* Chrome, Safari */ 
    -o-transform: rotate(50deg);
    transform: rotate(50deg);
}