<style>
body {
    font-family: monospace;
}

.absolute {
	position: absolute;
    margin: 50px;
	overflow: hidden;
	border: 3px solid blue;
	border-radius: 10px;
	box-shadow: 0px 0px 26px transparent;
}

.scroll {
    overflow: scroll;
	height: 300px;
}

.contents {
    background-color: green;
    margin: 0;
    height: 400px;
}

p {
    margin: 0;
    color: green;
}

.hider {
    position: absolute;
    background-color: gray;
}

.edge.hider {
    top: 20px;
    left: 260px;
    width: 80px;
    height: 400px;
}

.topleft.corner.hider {
    top: 40px;
    left: 44px;
    width: 40px;
    height: 40px;
}

.bottomleft.corner.hider {
    top: 340px;
    left: 45px;
    width: 40px;
    height: 40px;
}
</style>
<body>
    <div class=absolute>
        <div class=scroll>
            <div class="contents">
                <p>some text here some text here</p>
            </div>
        </div>
    </div>
    <div class="edge hider"></div>
    <div class="topleft corner hider"></div>
    <div class="bottomleft corner hider"></div>    
</body>