A text_block shows live game state on the HUD.
ScoreText : text_block = text_block{}
if (PlayerUI := GetPlayerUI[Player]):
PlayerUI.AddWidget(ScoreText)
var Score : int = 0
set Score = Score + 10
ScoreText.SetText(UIText("Score: {Score}"))
Takeaway — Change the var, call SetText, HUD updates.