<div class="box"></div>
<img src="https://picsum.photos/id/152/300/300" alt="Purple flowers">
.box {
width:300px;
aspect-ratio:1;
display:inline-block;
border:1px solid blue;
--g: 6px; /* control the gap */
--r: 42px; /* control the circular shapes */
background:
radial-gradient(var(--r) at left 50% bottom var(--r),green 95%,#0000),
radial-gradient(calc(var(--r) + var(--g)) at calc(100% + var(--g)) 50%,#0000 95%,red)
top/100% calc(100% - var(--r)) no-repeat;
}
img {
--g: 6px; /* control the gap */
--r: 42px; /* control the circular shapes */
--_m:
radial-gradient(calc(var(--r) + var(--g)) at calc(100% + var(--g)) 50%,#0000 95%,#000)
top/100% calc(100% - var(--r)) no-repeat,
radial-gradient(var(--r) at left 50% bottom var(--r),#000 95%,#0000);
-webkit-mask: var(--_m);
mask: var(--_m);
}
This Pen doesn't use any external CSS resources.
This Pen doesn't use any external JavaScript resources.