function hsvtorgb(col: text, h: number, sat: number, val: number) :: number:
    set {_h} to mod({_h}, 360)
    if {_sat} > 1:
        set {_sat} to 1
    else if {_sat} < 0:
        set {_sat} to 0
    if {_val} > 1:
        set {_val} to 1
    else if {_val} < 0:
        set {_val} to 0
    set {_c} to {_val} * {_sat}
    set {_hh} to {_h}/60
    set {_t} to mod({_hh}, 2) - 1
    set {_x} to {_c} * (1 - abs({_t}))
    set {_m} to {_v} - {_c}
    set {_ret} to {_m}
    if {_col} is "red" or "r":
        if {_hh} < 1:
            add {_c} to {_ret}
        else if {_hh} < 2:
            add {_x} to {_ret}
        else if {_hh} < 4:
            set {_ret} to {_ret}
        else if {_hh} < 5:
            add {_x} to {_ret}
        else if {_hh} < 6:
            add {_c} to {_ret}
    else if {_col} is "green" or "g":
        if {_hh} < 1:
            add {_x} to {_ret}
        else if {_hh} < 2:
            add {_c} to {_ret}
        else if {_hh} < 3:
            add {_c} to {_ret}
        else if {_hh} < 4:
            add {_x} to {_ret}
    else if {_col} is "blue" or "b":
        if {_hh} < 2:
            set {_ret} to {_ret}
        else if {_hh} < 3:
            add {_x} to {_ret}
        else if {_hh} < 5:
            add {_c} to {_ret}
        else if {_hh} < 6:
            add {_x} to {_ret}
    return 0-{_ret}

function rgb(r: number, g: number, b: number, locs: locations):
    loop {_locs::*}:
        set {_x} to x-coordinate of loop-value
        set {_y} to y-coordinate of loop-value
        set {_z} to z-coordinate of loop-value
        execute command "/particle reddust %{_x}% %{_y}% %{_z}% %{_r}% %{_g}% %{_b}% 1"

function rainbow(h: number, locs: locations):
    set {_r} to hsvtorgb("r", {_h}, 1, 1)
    set {_g} to hsvtorgb("g", {_h}, 1, 1)
    set {_b} to hsvtorgb("b", {_h}, 1, 1)
    rgb({_r}, {_g}, {_b}, {_locs::*})

command /rainbow-halo:
    trigger:
        set {_circle::*} to circle with radius 0.75 and density 5
        set {_hue} to 0
        set {run} to true
        while {run} is true:
            loop {_circle::*}:
                set {_loc} to location 2 above player offset by loop-value in frame of player
                rainbow({_hue}, {_loc})
                add 5 to {_hue}
                if {_hue} > 360:
                    set {_hue} to {_hue} - 360
                if {run} is true:
                    wait 2 ticks
                else:
                    stop trigger

command /rainbow-yaw-helix:
    trigger:
        set {_helix::*} to helix with radius 1, height 2, step 0.25 and density 10
        set {_hue} to 0
        set {run} to true
        while {run} is true:
            loop {_helix::*}:
                set {_loc} to player offset by loop-value
                set {_yaw} to yaw of player
                rainbow({_yaw}, {_loc})
                if {run} is true:
                    wait 1 tick
                else:
                    stop trigger

function rainbow_lines(p: player):
    set {_yaw} to random number from 0 to 360
    set {_startheight} to random number from -0.5 to 1.5
    set {_endheight} to {_startheight} + random number from 1 to 2
    set {_hue} to random number from 0 to 360
    set {_start} to cylindrical vector with radius 0.75, yaw {_yaw} and height {_startheight}
    set {_end} to cylindrical vector with radius 0.75, yaw {_yaw} and height {_endheight}
    set {_line::*} to vector line from {_start} to {_end} with density 5
    loop {_line::*}:
        set {_loc} to {_p} offset by loop-value
        rainbow({_hue}, {_loc})
        if {run} is true:
            wait 1 tick
        else:
            stop loop

command /rainbow-lines:
    trigger:
        set {_line::*} to vector line from vector 0, 0, 0 to vector 0, 1, 0 with density 5
        set {_size} to size of {_line::*}
        set {run} to true
        while {run} is true:
            chance of 50%:
                rainbow_lines(player)
            wait 5 ticks

command /stopeffect:
    trigger:
        clear {run}