HTML5是一種強大的網絡開發語言，它可以實現很多有趣的功能，比如說摩天輪程序。以下是一個簡單的HTML5摩天輪代碼段：

<canvas id="wheel-canvas" width="600" height="600"></canvas>
<script>
var canvas = document.getElementById("wheel-canvas");
var context = canvas.getContext("2d");
var posX = 300;
var posY = 300;
var radius = 250;
var rotation = 0;
var speed = 0.01;
var numWedges = 8;
var wedgeAngle = (Math.PI*2)/numWedges;
function drawWheel(){
context.clearRect(0, 0, canvas.width, canvas.height);
context.beginPath();
context.arc(posX, posY, radius, 0, Math.PI*2, false);
context.closePath();
context.lineWidth = 10;
context.strokeStyle = '#666666';
context.stroke();
for(var i=0; i<numWedges; i++){
context.beginPath();
context.moveTo(posX, posY);
context.arc(posX, posY, radius, i*wedgeAngle-rotation, (i+1)*wedgeAngle-rotation, false);
context.closePath();
context.fillStyle = '#'+Math.floor(Math.random()*16777215).toString(16);
context.fill();
context.lineWidth = 1;
context.strokeStyle = '#000000';
context.stroke();
}
}
function animateWheel(){
rotation += speed;
drawWheel();
requestAnimationFrame(animateWheel);
}
window.onload = function(){
animateWheel();
};
</script>

該代碼段使用HTML5的<canvas>元素創建一個摩天輪。代碼使用JavaScript和Canvas API繪制圖形和動畫。通過改變speed變量來改變摩天輪的速度或改變numWedges變量來增加或減少扇形的數量。