额。。是登陆后没有刷新页面吗... 交个作业

function draw(open, close, low, high, index, screenWidth, screenHeight) {
    var originX = (screenWidth / 30) * (index+1);
    var originY = 20;
    var zoom = 0.25;    

    var ceil = originY + (high - Math.max(open, close)) * zoom;
    var floor = originY + (high - Math.min(open, close)) * zoom;
    var base = originY + (high - low) * zoom;
    var top = originY;

    doDraw(originX, base, top, ceil, floor)    
}

function doDraw(originX, base, top, ceil, floor) {
    console.log("originX:", originX);
    console.log("base:", base);
    console.log("top:", top);
    console.log("ceil:", ceil);
    console.log("floor:", floor);

    var path = new Path2D();
    var padding = 4;
    path.moveTo(originX, top);
    path.lineTo(originX, ceil);
    ctx.stroke(path);
    ctx.strokeRect(originX - padding, ceil, padding*2, (floor - ceil));
    path.moveTo(originX, floor);
    path.lineTo(originX, base);
    ctx.stroke(path); 
}

for (var i = 0; i < data.length; i++) {
    var open = data[i].open;
    var close = data[i].close;
    var low = data[i].low;
    var high = data[i].high;

    draw(open, close, low, high, i, width, height);    
}