update worker url resolution

pkg/ludus.js

@@ -1,6 +1,7 @@
 if (window) window.ludus = {run, kill, flush_stdout, stdout, p5, svg, flush_commands, commands, result, input, is_running}
 
-const worker = new Worker("./worker.js", {type: "module"})
+const worker_url = new URL("worker.js", import.meta.url)
+const worker = new Worker(worker_url, {type: "module"})
 
 let outbox = []
 let ludus_console = ""

sandbox.ld

@@ -1 +1,34 @@
-:foobar
+fn inputter () -> {
+  if do input > unbox > empty?
+    then {
+      yield! ()
+      inputter ()
+    }
+    else receive {
+      (:get, pid) -> send (pid, (:reply, unbox (input)))
+      (:flush, pid) -> {
+        send (pid, (:reply, unbox (input)))
+        store! (input, "")
+      }
+      (:clear) -> store! (input, "")
+    }
+  
+}
+
+fn clear_input () -> store! (input, "")
+
+fn read_input () -> {
+  let reader = spawn! (inputter)
+  send (reader, (:get, self ()))
+  receive {
+    (:reply, msg) -> msg
+  }
+}
+
+fn flush_input () -> {
+  let reader = spawn! (inputter)
+  send (reader, (:flush, self ()))
+  receive {
+    (:reply, msg) -> msg
+  }
+}