sticker pull off effect with css - css

Question

I'm trying to create a sticker pull off effect with css.
For that I found this example: https://codepen.io/patrickkunka/pen/axEgL
Now I have three problems.
I'm using an image and not only colors.
The peeling effect is way to far in the example
Because I'm using an image, I can't move it around.
Now let me show the problems with some code:
.test-sticker {
/*
.sticker:hover .sticky{
transform: rotate(10deg);
}
*/
}
.test-sticker .anim750 {
transition: all 750ms ease-in-out;
}
.test-sticker .sticker {
position: relative;
width: 180px;
height: 180px;
margin: 0 auto;
backface-visibility: hidden;
}
.test-sticker .sticker .sticky {
transform: rotate(-125deg);
}
.test-sticker .sticker .sticky {
position: absolute;
top: 0;
left: 0;
width: 180px;
height: 180px;
}
.test-sticker .sticker .reveal .circle {
font-family: 'helvetica neue', arial;
font-weight: 200;
line-height: 140px;
text-align: center;
cursor: pointer;
}
.test-sticker .sticker .reveal .circle {
background: purple;
}
.test-sticker .sticker .circle_wrapper {
position: absolute;
width: 180px;
height: 180px;
left: 0px;
top: 0px;
overflow: hidden;
}
.test-sticker .sticker .circle {
position: absolute;
width: 140px;
height: 140px;
margin: 20px;
border-radius: 999px;
}
.test-sticker .sticker .back {
height: 10px;
top: 30px;
}
.test-sticker .sticker .back .circle {
margin-top: -130px;
background-color: green;
}
.test-sticker .sticker .front {
height: 150px;
bottom: 0;
top: auto;
-webkit-box-shadow: 0 -140px 20px -140px rgba(0, 0, 0, 0.3);
}
.test-sticker .sticker .front .circle {
margin-top: -10px;
background: url("https://upload.wikimedia.org/wikipedia/commons/9/93/Wordpress_Blue_logo.png");
background-size: 140px 140px;
transform: rotate(-235deg);
}
.test-sticker .sticker:hover .back {
height: 90px;
top: 110px;
}
.test-sticker .sticker:hover .back .circle {
margin-top: -50px;
}
<div class="test-sticker">
<div class="wrapper">
<div class="sticker">
<div class="reveal circle_wrapper">
<div class="circle"></div>
</div>
<div class="sticky">
<div class="front circle_wrapper">
<div class="circle"></div>
</div>
</div>
<div class="sticky anim750">
<div class="back circle_wrapper anim750">
<div class="circle anim750"></div>
</div>
</div>
</div>
</div>
</div>
How do I get the greed circle just about 50% and not like now 80%?
Is there a fancy way to get the purple circle extended the same way like the green one? so when I hover over the image, I want to see the back of the sticker, which is white at the end.