Code Sketch

cleari() // Reset screen and stop old animations

// 1. Full-Screen Background (Centered properly at 0,0)
val bg = Picture {
    setPenColor(noColor)
    setFillColor(cm.black)
    penUp(); moveTo(-1000, -1000); penDown()
    moveTo(1000, -1000)
    moveTo(1000, 1000)
    moveTo(-1000, 1000)
    moveTo(-1000, -1000)
}
draw(bg)

// 2. Starfield
val stars = Picture {
    setPenColor(noColor)
    setFillColor(cm.white)
    for (i <- 1 to 250) {
        val x = (math.random * 1600) - 800
        val y = (math.random * 1600) - 800
        penUp(); moveTo(x, y); penDown()
        circle(1.2)
    }
}
draw(stars)

// 3. The Sun
val sun = Picture.circle(30)
sun.setFillColor(cm.yellow)
sun.setPenColor(cm.orange)
draw(sun)

// 4. Orbits & Distances
val distances = Array(60.0, 95.0, 135.0, 175.0, 240.0, 300.0, 350.0, 400.0)
val names = Array("Mercury", "Venus", "Earth", "Mars", "Jupiter", "Saturn", "Uranus", "Neptune")

for (d <- distances) {
    val track = Picture.circle(d)
    track.setPenColor(cm.darkGray)
    track.setFillColor(noColor)
    draw(track)
}

// 5. Asteroid Belt
val asteroidBelt = Picture {
    setPenColor(noColor)
    setFillColor(cm.gray)
    for (i <- 1 to 250) {
        val angle = math.random * math.Pi * 2
        val radius = 205.0 + (math.random * 15.0)
        val ax = radius * math.cos(angle)
        val ay = radius * math.sin(angle)
        penUp(); moveTo(ax, ay); penDown()
        circle(1)
    }
}
draw(asteroidBelt)

// 6. Planets (Bright, visible solid colors)
def makePlanet(size: Double, col: java.awt.Color) = {
    val p = Picture.circle(size)
    p.setFillColor(col)
    p.setPenColor(cm.black)
    draw(p)
    p
}

val planets = Array(
    makePlanet(8, cm.lightGray),  // Mercury
    makePlanet(10, cm.orange),     // Venus
    makePlanet(11, cm.blue),       // Earth
    makePlanet(9, cm.red),        // Mars
    makePlanet(16, cm.magenta),   // Jupiter
    makePlanet(14, cm.yellow),    // Saturn
    makePlanet(12, cm.cyan),       // Uranus
    makePlanet(11, cm.darkBlue)    // Neptune
)

// 7. Name Labels
val labels = new Array[Picture](8)
for (i <- 0 until 8) {
    labels(i) = Picture {
        setPenColor(cm.white)
        write(names(i))
    }
    draw(labels(i))
}

// 8. Animation Loop
val speeds = Array(0.04, 0.03, 0.025, 0.02, 0.012, 0.009, 0.006, 0.004)
val angles = Array(0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 1.5)

animate {
    asteroidBelt.rotate(0.1) // Slow spin for the asteroid belt
    
    for (i <- 0 until 8) {
        angles(i) = angles(i) + speeds(i)
        
        val x = distances(i) * math.cos(angles(i))
        val y = distances(i) * math.sin(angles(i))
        
        planets(i).setPosition(x, y)
        labels(i).setPosition(x + 10, y + 10) // Keeps text neatly next to the planet
    }
}