Server actually ticks

templates/mod/scripts/server.ts

@@ -4,8 +4,16 @@ import type { ServerContext } from "bworld/server";
 export function setup(ctx: ServerContext) {
 	// used by blocks/example_block.json, which passes { message } as params
 	ctx.components.register_block<{ message: string }>("example_mod:announce", {
-		on_interact(_block, params, player) {
-			player.send_message(params.message);
+		// block data is saved with the world. on_tick and on_second only run for blocks that have some
+		on_create(block) {
+			block.data = { age: 0 };
+		},
+		// on_tick runs 20 times a second, on_second once, while a player is nearby
+		on_second(block) {
+			block.data.age += 1;
+		},
+		on_interact(block, params, player) {
+			player.send_message(`${params.message} It's been here for ${block.data?.age ?? 0} seconds.`);
 			// handled, so right clicking it doesn't place a block
 			return true;
 		},