How would i make a event that draws a simple rectangle on the screen?

4 minutes ago, diesieben07 said:

You can use RenderGameOverlayEvent.Pre with ElementType.ALL to add to the HUD.

package me.kek.kekclient.event.events;

import net.minecraft.client.gui.GuiScreen;
import net.minecraftforge.client.event.RenderGameOverlayEvent;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;

public class WaterMarkThing extends GuiScreen {
    
    @SubscribeEvent
    public void onRender(RenderGameOverlayEvent event) {
        if (event.getType() == RenderGameOverlayEvent.ElementType.ALL) {
            drawRect(10, 10, 10, 10, 0xb8352c);
        }
    }
}

This code does not show a rectangle

Do you know why it does not?

I also put it in the eventbus in the init