SOURCE

function rainbow(){
    const ctx = document.getElementById('canvas').getContext('2d')
    const colors = ['red', 'orange','yellow','green','cyan','blue','purple']
    for(let i = 0; i<7;i++){
        ctx.beginPath()
        ctx.moveTo(100-i*10,400)
        ctx.arc(400,400,300+i*10,Math.PI,0)
        ctx.strokeStyle = colors[i]
        ctx.lineWidth = '10'
        ctx.stroke()
        ctx.closePath()
    }
    
}

rainbow()

const people = document.querySelector('.people')

<div class="container">
    <div class="people">
        <div class="body"></div>
        <div class="leg"></div>
        <div class="foot"></div>
    </div>

</div>
<canvas id="canvas" width="1000" height="500"></canvas>

.container{
    width: 720px;
    height: 700px;
    border-radius: 50%;
    position: absolute;
    left: 50px;
    top: 30px;
    animation: walk ease-in 6s infinite;
    .people{
        position: absolute;
        width: 50px;
        height: 100px;
        bottom: 350px;
        left:-30px;
        transform: rotate(10deg);
        .body{
            width: 10px;
            height: 100px;
            background-color: #000;
            border-radius: 50px;
        }
        .leg{
            width: 10px;
            height: 30px;
            background-color: #000;
            position: absolute;
            transform: rotate(45deg);
            top: 20px;
            left: 10px;
            animation: leg 1s linear infinite;
        }
        .foot{
            width: 10px;
            height: 50px;
            position: absolute;
            background-color: #000;
            transform: rotate(-65deg);
            top: 70px;
            left: 10px;
            animation: foot 1s linear infinite;
        }
    }
}

@keyframes leg{
    from {
        transform: rotate(45deg)
    }
    to{
        transform: rotate(90deg)
    }
}

@keyframes foot{
    from{
        transform:  rotate(-65deg)
    }
    to{
        transform: rotate(-25deg)
    }
}

@keyframes walk{
    from{
        transform: rotate(0)
    }
    to{
        transform: rotate(170deg)
    }
}