> For the complete documentation index, see [llms.txt](https://docs.punkland.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.punkland.io/punkland-studio/script/client.md). # Client Script * The client script must exist in the project folder or in Scripts with a file name like Hello.lua to be read.
scriptexplanation
Client.widthGets the width of the screen.
Client.heightGets the vertical size of the screen.
Client.ShowAlert(text, callback)Displays a notification message.
Client.ShowYesNoAlert(text, callback)Displays a Yes/No notification message.
Client.ShowBuyItem(id, amount, callback)Displays a message to purchase a specific item.
Client.Quit()Close the client.
ScriptEventPublisher Client.GetTopic(topic)Register a specific topic to exchange messages with the server.
Client.FireEvent(topic, args…)Sends a message to the server with a specific topic.
Client.RunLater(callback, t)Executes a callback function after t seconds.
CameraObject that controls the camera
PointA class that contains x, y coordinates
RectA class that contains a rectangle with x, y, width, and height.
ImageA class that outputs images
TextA class that prints text
SliderA class that outputs a control controller.
ButtonClass that outputs the button
PanelA class that outputs a panel.
ScrollPanelA class that outputs a scrolling panel.
GridPanelA class that outputs panels arranged in a grid.