diff -r 244df77507c2 -r 253d1ccb65de main_marking5/bf_test4.scala
--- a/main_marking5/bf_test4.scala	Sun Sep 15 12:57:59 2024 +0100
+++ b/main_marking5/bf_test4.scala	Mon Jul 21 16:38:07 2025 +0100
@@ -1,28 +1,31 @@
-import M5a._
+
+def urbanmain() = {
+
+  import M5a._
 
 
-import scala.concurrent._
-import scala.concurrent.duration._
-import ExecutionContext.Implicits.global
-import scala.language.postfixOps 
+  import scala.concurrent._
+  import scala.concurrent.duration._
+  import ExecutionContext.Implicits.global
+  import scala.language.postfixOps 
 
-lazy val f = Future {
+  lazy val f = Future {
 
-assert(run("[-]", Map(0 -> 100)) == Map(0 -> 0))
-assert(run("[->+<]", Map(0 -> 10)) == Map(0 -> 0, 1 -> 10))
-assert(run("[>>+>>+<<<<-]", Map(0 -> 42)) == Map(0 -> 0, 2 -> 42, 4 -> 42))
+    assert(run("[-]", Map(0 -> 100)) == Map(0 -> 0))
+    assert(run("[->+<]", Map(0 -> 10)) == Map(0 -> 0, 1 -> 10))
+    assert(run("[>>+>>+<<<<-]", Map(0 -> 42)) == Map(0 -> 0, 2 -> 42, 4 -> 42))
 
 
-val hw_urban = """+++++[->++++++++++<]>--<+++[->>++++++++++
+    val hw_urban = """+++++[->++++++++++<]>--<+++[->>++++++++++
                   <<]>>++<<----------[+>.>.<+<]"""
-assert(run(hw_urban) == Map(0 -> 0, 1 -> 58, 2 -> 32))
+    assert(run(hw_urban) == Map(0 -> 0, 1 -> 58, 2 -> 32))
 
-val hw_urban1 = """++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.
+    val hw_urban1 = """++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.
                    +++++++..+++.>>.<-.<.+++.------.--------.>>+.>++."""
 
-assert(run(hw_urban1) == Map(0 -> 0, 5 -> 33, 1 -> 0, 6 -> 10, 2 -> 72, 3 -> 100, 4 -> 87))
+    assert(run(hw_urban1) == Map(0 -> 0, 5 -> 33, 1 -> 0, 6 -> 10, 2 -> 72, 3 -> 100, 4 -> 87))
 
+  }
+
+  Await.result(f, 32 second)
 }
-
-Await.result(f, 32 second)
-