Speed Acceleration

 player = .Players.LocalPlayer
 character = player.Character  player.CharacterAdded:()
 humanoid = character:()
 runService = :()
 userInputService = :()

 screenGui = .(, player.PlayerGui)

 frame = .(, screenGui)
frame.Size = .(, , , )
frame.Position = .(, -, , )
frame.BackgroundColor3 = .(, , )

 dragBar = .(, frame)
dragBar.Size = .(, , , )
dragBar.BackgroundColor3 = .(, , )
dragBar.Active = 

 speedBox = .(, frame)
speedBox.Size = .(, , , )
speedBox.Position = .(, , , )
speedBox.PlaceholderText = 
speedBox.Text = 

 accelBox = .(, frame)
accelBox.Size = .(, , , )
accelBox.Position = .(, , , )
accelBox.PlaceholderText = 
accelBox.Text = 

 speedometer = .(, frame)
speedometer.Size = .(, , , )
speedometer.Position = .(, , , )
speedometer.BackgroundColor3 = .(, , )
speedometer.TextColor3 = .(, , )
speedometer.Text = 

 maxSpeed = 
 acceleration = 
 decelerationMultiplier = 
 currentSpeed = 
 boostAmount = 
 boostCooldown = 

speedBox.FocusLost:(()
     speed = (speedBox.Text)
     speed 
        maxSpeed = speed
    
)

accelBox.FocusLost:(()
     accel = (accelBox.Text)
     accel 
        acceleration = accel
    
)

runService.RenderStepped:((deltaTime)
     humanoid.MoveDirection.Magnitude >  
         currentSpeed < maxSpeed 
            currentSpeed = .(currentSpeed + acceleration * deltaTime, maxSpeed)
        
    
         currentSpeed > maxSpeed 
            currentSpeed = .(currentSpeed - (acceleration * decelerationMultiplier * deltaTime), maxSpeed)
         currentSpeed >  
            currentSpeed = .(currentSpeed - (acceleration * decelerationMultiplier * deltaTime), )
        
    
    humanoid.WalkSpeed = currentSpeed
    speedometer.Text =  .. .(currentSpeed)
)

userInputService.InputBegan:((input, gameProcessed)
     input.KeyCode == .KeyCode.LeftShift   gameProcessed   boostCooldown 
        boostCooldown = 
        currentSpeed = currentSpeed + boostAmount
        .(, ()
            boostCooldown = 
        )
    
)

 dragging, dragInput, startPos

  (input)
     delta = input.Position - startPos
    frame.Position = .(frame.Position.X.Scale, frame.Position.X.Offset + delta.X, frame.Position.Y.Scale, frame.Position.Y.Offset + delta.Y)
    startPos = input.Position


dragBar.InputBegan:((input)
     input.UserInputType == .UserInputType.MouseButton1 
        dragging = 
        startPos = input.Position
        input.Changed:(()
             input.UserInputState == .UserInputState.End 
                dragging = 
            
        )
    
)

dragBar.InputChanged:((input)
     input.UserInputType == .UserInputType.MouseMovement 
        dragInput = input
    
)

:().InputChanged:((input)
     input == dragInput  dragging 
        (input)
    
)