upping the examples!

test/forest.v

@@ -3,10 +3,17 @@ namespace places;
 required link world;
 link[] roads;
 
-member fertility;
+member nitrogen;
 
 restore {
-	this.fertility ??= Math.floor(Math.random() * 100);
+	this.nitrogen ??= Math.floor(Math.random() * 50);
+}
+
+takeNitrogen (requested) {
+	// give as much nutrients as we can!
+	const given = Math.max(this.nitrogen, requested);
+	this.nitrogen -= given;
+	return given;
 }
 
 ping {

test/tree.v

@@ -0,0 +1,15 @@
+namespace structures;
+
+member alive;
+member age;
+
+required link land;
+
+restore {
+	alive ??= true;
+	age ??= 0;
+}
+
+tick (days) {
+	
+}