diff --git a/src/app/pages/welcome/welcome.component.ts b/src/app/pages/welcome/welcome.component.ts
index 5139a54..3669d3b 100644
--- a/src/app/pages/welcome/welcome.component.ts
+++ b/src/app/pages/welcome/welcome.component.ts
@@ -30,6 +30,21 @@ interface WindowCell {
   style: Record<string, string>;
 }
 
+interface Star {
+  style: Record<string, string>;
+}
+
+interface BackgroundBuilding {
+  style: Record<string, string>;
+}
+
+interface WindowCell {
+  state: 'off' | 'on';
+  color?: string;
+  glowColor?: string;
+  style: Record<string, string>;
+}
+
 @Component({
   selector: 'app-welcome',
   standalone: true,