Rainbow

Introduction

Make a beautiful rainbow on your horizon!

Chat command

Put in an ||player:on chat command|| and rename it to rainbow.

player.onChat("rainbow", function () {

})

Set the radius

To set the size of the rainbow, make a variable named ||variables:radius||. Put it in the ||loops:on start|| and set it to 100.

let radius = 100
player.onChat("rainbow", function () {

})

Get player’s position

Save the player’s current position as the horizon where the rainbow appears. Use a variable named ||variables:horizon|| in the ||player:on chat command|| and set it to ||player:player world position||.

let radius = 100
player.onChat("rainbow", function () {
    let horizon = player.position()
})

Draw a circle

The rainbow will have 7 color bands which arc in a semicircle at the horizon. Make the first color band by pulling in a ||shapes:circle of|| from ||shapes:SHAPES|| into ||player:on chat command|| (you can find ||shapes:SHAPES|| in the Advanced portion of the Toolbox). Change the block to Red Concrete and use the ||variables:horizon|| variable for the center.

let radius = 100
player.onChat("rainbow", function () {
    let horizon = player.position()
    shapes.circle(
        RED_CONCRETE,
        horizon,
        5,
        Axis.X,
        ShapeOperation.Replace
        )
})

Make a circle outline

Use the ||variables:radius|| variable for the ||shapes:radius|| value in ||shapes:circle of||. Make the shape operation be ||shapes:outline|| instead of ||shapes:replace||.

let radius = 100
player.onChat("rainbow", function () {
    let horizon = player.position()
    shapes.circle(
        RED_CONCRETE,
        horizon,
        radius,
        Axis.X,
        ShapeOperation.Outline
        )
})

Second layer

Duplicate the ||shapes:circle of|| and place the new copy just below the first one. In the new ||shapes:circle of||, change the block to Orange Concrete. Now, go to ||math:MATH|| and get a ||math:0 - 0||. Put it in for the ||shapes:radius|| value of the new ||shapes:circle of||. Change the ||math:0 - 0|| expression so that it subtracts 1 from the ||variables:radius|| variable.

let radius = 100
player.onChat("rainbow", function () {
    let horizon = player.position()
    shapes.circle(
        RED_CONCRETE,
        horizon,
        radius,
        Axis.X,
        ShapeOperation.Outline
        )
    shapes.circle(
        ORANGE_CONCRETE,
        horizon,
        radius - 1,
        Axis.X,
        ShapeOperation.Outline
        )
})

Third layer

Copy the second ||shapes:circle of|| and place it at the end of ||player:on chat command||. In that new copy, change the block to Yellow Concrete and set the ||shapes:radius|| value to ||variables:radius|| minus 2.

let radius = 100
player.onChat("rainbow", function () {
    let horizon = player.position()
    shapes.circle(
        RED_CONCRETE,
        horizon,
        radius,
        Axis.X,
        ShapeOperation.Outline
        )
    shapes.circle(
        ORANGE_CONCRETE,
        horizon,
        radius - 1,
        Axis.X,
        ShapeOperation.Outline
        )
    shapes.circle(
        YELLOW_CONCRETE,
        horizon,
        radius - 2,
        Axis.X,
        ShapeOperation.Outline
        )
})

More layers

Copy the last ||shapes:circle of|| and place it at the end of ||player:on chat command||. In that new copy, change the block to Lime Concrete and set the ||shapes:radius|| value to ||variables:radius|| minus 3. Repeat what you just did with ||shapes:circle of|| but change the block to Light Blue Concrete and set the ||shapes:radius|| value to ||variables:radius|| minus 4.

let radius = 100
player.onChat("rainbow", function () {
    let horizon = player.position()
    shapes.circle(
        RED_CONCRETE,
        horizon,
        radius,
        Axis.X,
        ShapeOperation.Outline
        )
    shapes.circle(
        ORANGE_CONCRETE,
        horizon,
        radius - 1,
        Axis.X,
        ShapeOperation.Outline
        )
    shapes.circle(
        YELLOW_CONCRETE,
        horizon,
        radius - 2,
        Axis.X,
        ShapeOperation.Outline
        )
    shapes.circle(
        LIME_CONCRETE,
        horizon,
        radius - 3,
        Axis.X,
        ShapeOperation.Outline
        )
    shapes.circle(
        LIGHT_BLUE_CONCRETE,
        horizon,
        radius - 4,
        Axis.X,
        ShapeOperation.Outline
        )
})

Last layers

Again, copy the last ||shapes:circle of|| and place it at the end of ||player:on chat command||. In that new copy, change the block to Blue Concrete and set the ||shapes:radius|| value to ||variables:radius|| minus 5. Repeat what you just did with ||shapes:circle of|| but change the block to Purple Concrete and set the ||shapes:radius|| value to ||variables:radius|| minus 6.

let radius = 100
player.onChat("rainbow", function () {
    let horizon = player.position()
    shapes.circle(
        RED_CONCRETE,
        horizon,
        radius,
        Axis.X,
        ShapeOperation.Outline
        )
    shapes.circle(
        ORANGE_CONCRETE,
        horizon,
        radius - 1,
        Axis.X,
        ShapeOperation.Outline
        )
    shapes.circle(
        YELLOW_CONCRETE,
        horizon,
        radius - 2,
        Axis.X,
        ShapeOperation.Outline
        )
    shapes.circle(
        LIME_CONCRETE,
        horizon,
        radius - 3,
        Axis.X,
        ShapeOperation.Outline
        )
    shapes.circle(
        LIGHT_BLUE_CONCRETE,
        horizon,
        radius - 4,
        Axis.X,
        ShapeOperation.Outline
        )

    shapes.circle(
        BLUE_CONCRETE,
        horizon,
        radius - 5,
        Axis.X,
        ShapeOperation.Outline
        )
    shapes.circle(
        PURPLE_CONCRETE,
        horizon,
        radius - 6,
        Axis.X,
        ShapeOperation.Outline
        )
})

Show the rainbow!

Go to the chat command in Minecraft and type rainbow. Move back and watch your beautiful rainbow form in the sky! If you want a bigger or smaller rainbow, just change the setting of the ||variables:radius|| variable in ||loops:on start||.