Code for boss fight and health bar in UEFN and Verse

boss_fight.verse

using { /Fortnite.com/Devices }
using { /Fortnite.com/Characters }
using { /Verse.org/Simulation }
using { /Verse.org/Random }
using { /UnrealEngine.com/Temporary/Diagnostics }
using { /UnrealEngine.com/Temporary/UI }
using { /Fortnite.com/UI }
using { /UnrealEngine.com/Temporary/SpatialMath}
using { /Verse.org/Colors }
using { /Verse.org/Colors/NamedColors }

health_bar := class():
    var iTotalHP<private> : float = 1000.0
    var iCurrentHP<private> : float = 1000.0
    var iBossName<private> : string = "Bulgna The Ugly"

    
    BossBarColorBase<private> : color_block = color_block{
        DefaultColor := MakeColorFromHex("000000")
        DefaultDesiredSize := vector2{X:= 1200.0, Y := 40.0}} 

    var BossBarColorTop<private> : color_block = color_block{}  
    var Overlay<private> : overlay = overlay{}
        
    HPBarTitleTextBlock<private> : text_block = text_block{DefaultTextColor := MakeColorFromHex("FFFFFF")}

    HPTitleText<private><localizes>(HPText : string) : message = "{HPText}"

    Init(BossName : string, BossTotalHP: float):void=
        set iBossName = BossName
        set iTotalHP = BossTotalHP
        set iCurrentHP = BossTotalHP
        HPBarTitleTextBlock.SetText(HPTitleText("{iBossName}: {iCurrentHP}/{iTotalHP}"))

    TakeDamage(DamageAmount : float):void=
        set iCurrentHP -= DamageAmount
        if (iCurrentHP < 0.0):
            set iCurrentHP = 0.0
 
        HealthPercentage := iCurrentHP / iTotalHP
        BarSize := BossBarColorBase.GetDesiredSize()
        NewHealthBarWidth := BarSize.X * HealthPercentage
        if (Current := Int[iCurrentHP], Total := Int[iTotalHP]):
            HPBarTitleTextBlock.SetText(HPTitleText("{iBossName}: {Current}/{Total}"))
        
        UpdateHealthBar(NewHealthBarWidth)
    
    Heal(HealAmount : float):void=
        block:

    ShowUIForPlayer(Player : player):void=
        if (PlayerUI := GetPlayerUI[Player]):
            PlayerUI.AddWidget(CreateUI())

    ShowUIToAllPlayers():void=
        block:

    MyButton : button_device = button_device{}

    UpdateHealthBar(NewWidth : float):void=
        Overlay.RemoveWidget(HPBarTitleTextBlock)
        Overlay.RemoveWidget(BossBarColorTop)
        set BossBarColorTop = CreateTopHealthBar(NewWidth)

        Overlay.AddWidget(CreateOverlaySlot(BossBarColorTop, horizontal_alignment.Left))
        Overlay.AddWidget(CreateOverlaySlot(HPBarTitleTextBlock,horizontal_alignment.Center))
        
    CreateOverlaySlot<private>(TheWidget : widget, HAlignment : horizontal_alignment):overlay_slot=  
        overlay_slot:
            Widget := TheWidget 
            HorizontalAlignment := HAlignment

    CreateTopHealthBar<private>(Width: float):color_block=
        ColorBlock := color_block{
            DefaultColor := MakeColorFromHex("ff2a00")
            DefaultDesiredSize := vector2{X:= Width, Y := 40.0}} 
        
        set BossBarColorTop = ColorBlock
        

    CreateOverlay<private>() : overlay=
        TheOverlay := overlay:
            Slots := array:
                overlay_slot:
                    Widget := BossBarColorBase
                overlay_slot:
                    Widget := CreateTopHealthBar(1200.0)
                overlay_slot:
                    Widget := HPBarTitleTextBlock
        set Overlay = TheOverlay


    CreateUI<private>() : canvas=
        TheCanvas : canvas = canvas:
            Slots := array:
                canvas_slot:
                    Anchors := anchors{Minimum := vector2{X := 0.5, Y := 0.9}, Maximum := vector2{X := 0.5, Y := 0.9}}
                    Offsets := margin{Top := 0.0, Left := 0.0, Right := 0.0, Bottom := 100.0}
                    Alignment := vector2{X := 0.5, Y := 1.0}
                    Widget := stack_box:
                        Orientation := orientation.Vertical
                        Slots := array:
                            stack_box_slot:
                                Widget := CreateOverlay()
                            
                                                                
        return TheCanvas        
    


boss_fight := class(creative_device):

 
    @editable SmashAtackCinema : cinematic_sequence_device = cinematic_sequence_device{}
    @editable ComboAttackCinema : cinematic_sequence_device = cinematic_sequence_device{}
    @editable WalkCinema : cinematic_sequence_device = cinematic_sequence_device{}

    @editable BossManip : prop_manipulator_device = prop_manipulator_device{}
    @editable Boss : creative_prop = creative_prop{}

    BossHPBar : health_bar = health_bar{}
    
    OnBegin<override>()<suspends>:void=
        AllPlayers := GetPlayspace().GetPlayers()
        BossHPBar.Init("Aknar The Terrible", 1000.0)

        if (Player := AllPlayers[0]):
            BossHPBar.ShowUIForPlayer(Player)

        BossManip.DamagedEvent.Subscribe(OnBossDamaged)

        loop:
            RotateTowardPlayer()
            MoveAnimation()
            PlayRandomAttack()
            
            
        
    PlayRandomAttack()<suspends>:void=
        if (GetRandomInt(0,1) = 0):
            SmashAnimation()
        else:
            ComboAttack()
            RotateTowardPlayer()
            ComboAttack()
            

    OnBossDamaged(Agent : agent):void=
        BossHPBar.TakeDamage(10.0)

    SmashAnimation()<suspends>:void=
        SmashAtackCinema.Play()
        Sleep(5.0)

    ComboAttack()<suspends>:void=
        ComboAttackCinema.Play()
        Sleep(6.27)


    MoveAnimation()<suspends>:void=
        WalkCinema.Play()
        AllPlayers := GetPlayspace().GetPlayers()
        if (Player := AllPlayers[0], Agent := agent[Player], Fort := Agent.GetFortCharacter[]):
            PlayerTran := Fort.GetTransform()
            Boss.MoveTo(PlayerTran.Translation, Boss.GetTransform().Rotation, 4.0)
            


    RotateTowardPlayer()<suspends>:void=
        AllPlayers := GetPlayspace().GetPlayers()
        if (Player := AllPlayers[0], Agent := agent[Player], Fort := Agent.GetFortCharacter[]):
    
            PropLocation := Boss.GetTransform().Translation
            PlayerLocation := Fort.GetTransform().Translation

            if (LookDirection := (PlayerLocation - PropLocation).MakeUnitVector[]):

                Yaw := RadiansToDegrees(ArcTan(LookDirection.Y, LookDirection.X)) - 90.0
                Pitch := RadiansToDegrees(ArcTan(LookDirection.Z, Sqrt((LookDirection.X * LookDirection.X) + (LookDirection.Y * LookDirection.Y))))
                Roll := 0.0

                NewRotation := MakeRotationFromYawPitchRollDegrees(Yaw, Pitch, Roll)

                Boss.MoveTo(Boss.GetTransform().Translation, NewRotation, 2.0)
            

Wonderful looking boss fight health bar, very simple and straight forward, code is very clean and it doesn't take much to understand and edit yourself.
That said, this does feel like it's missing a remove UI for player function

@6matthias
If you just take the first part of the UpdateHealthBar() function it removes the existing widgets, you can probably just make a new function that only contains that portion.
RemoveHealthBar():void=
Overlay.RemoveWidget(HPBarTitleTextBlock)
Overlay.RemoveWidget(BossBarColorTop)

Does anyone know how to display the UI for all players or can recommend a resource where I can learn how to do this?

This code is realy great, can you please give me advice how to remove UI when you kill the boss, I can remove text_block, but I can't remove Color Blocks. Can anyone please help me with this?