04 Stage 
In this chapter, we will implement stage component.
Stage Component 
Let's first set up stage:
TypeScript
export const stage = {}JavaScript
export const stage = {}TypeScript
// ...
const components = [initialization, stage] as const
// ...JavaScript
// ...
const components = [initialization, stage]
// ...Declaring 
We also need to declare skin sprites:
TypeScript
export const skin = defineSkin({
    sprites: {
        judgeLine: SkinSpriteName.JudgmentLine,
    },
})JavaScript
export const skin = defineSkin({
    sprites: {
        judgeLine: SkinSpriteName.JudgmentLine,
    },
})Drawing 
We can simply draw it in the update method of stage component:
TypeScript
export const stage = {
    update() {
        const layout = new Rect({
            l: judgeLine.l,
            r: judgeLine.r,
            t: 1 - note.radius / 4,
            b: 1 + note.radius / 4,
        })
        skin.sprites.judgeLine.draw(layout, 0, 1)
    },
}JavaScript
export const stage = {
    update() {
        const layout = new Rect({
            l: judgeLine.l,
            r: judgeLine.r,
            t: 1 - note.radius / 4,
            b: 1 + note.radius / 4,
        })
        skin.sprites.judgeLine.draw(layout, 0, 1)
    },
}