diff --git a/Triangle.Compiler/.settings/org.eclipse.buildship.core.prefs b/Triangle.Compiler/.settings/org.eclipse.buildship.core.prefs
index b1886ad..69803e8 100644
--- a/Triangle.Compiler/.settings/org.eclipse.buildship.core.prefs
+++ b/Triangle.Compiler/.settings/org.eclipse.buildship.core.prefs
@@ -1,2 +1,13 @@
-connection.project.dir=..
+arguments=
+auto.sync=false
+build.scans.enabled=false
+connection.gradle.distribution=GRADLE_DISTRIBUTION(LOCAL_INSTALLATION(/usr/share/java/gradle))
+connection.project.dir=
 eclipse.preferences.version=1
+gradle.user.home=
+java.home=/usr/lib/jvm/java-11-openjdk
+jvm.arguments=
+offline.mode=false
+override.workspace.settings=true
+show.console.view=true
+show.executions.view=true
diff --git a/Triangle.Compiler/src/main/java/triangle/StdEnvironment.java b/Triangle.Compiler/src/main/java/triangle/StdEnvironment.java
index 90507d0..8aef811 100644
--- a/Triangle.Compiler/src/main/java/triangle/StdEnvironment.java
+++ b/Triangle.Compiler/src/main/java/triangle/StdEnvironment.java
@@ -34,7 +34,7 @@ public final class StdEnvironment {
 
 	public static ConstDeclaration falseDecl, trueDecl, maxintDecl;
 
-	public static UnaryOperatorDeclaration notDecl;
+	public static UnaryOperatorDeclaration notDecl, barDecl;
 
 	public static BinaryOperatorDeclaration andDecl, orDecl, addDecl, subtractDecl, multiplyDecl, divideDecl,
 			moduloDecl, equalDecl, unequalDecl, lessDecl, notlessDecl, greaterDecl, notgreaterDecl;
@@ -43,4 +43,6 @@ public final class StdEnvironment {
 
 	public static FuncDeclaration chrDecl, ordDecl, eolDecl, eofDecl;
 
+	//public static Object barDecl;
+
 }
diff --git a/Triangle.Compiler/src/main/java/triangle/contextualAnalyzer/Checker.java b/Triangle.Compiler/src/main/java/triangle/contextualAnalyzer/Checker.java
index 8b05b53..188a632 100644
--- a/Triangle.Compiler/src/main/java/triangle/contextualAnalyzer/Checker.java
+++ b/Triangle.Compiler/src/main/java/triangle/contextualAnalyzer/Checker.java
@@ -953,6 +953,9 @@ public final class Checker implements ActualParameterVisitor<FormalParameter, Vo
 				StdEnvironment.booleanType);
 		StdEnvironment.notlessDecl = declareStdBinaryOp(">=", StdEnvironment.integerType, StdEnvironment.integerType,
 				StdEnvironment.booleanType);
+		
+		//PRAC3 # Here we are adding the barDecl, Unary op. that takes 1 val and returns 1 val
+		StdEnvironment.barDecl = declareStdUnaryOp("|", StdEnvironment.integerType, StdEnvironment.integerType);
 
 		StdEnvironment.charDecl = declareStdType("Char", StdEnvironment.charType);
 		StdEnvironment.chrDecl = declareStdFunc("chr",
diff --git a/Triangle.Compiler/src/main/java/triangle/treeDrawer/LayoutVisitor.java b/Triangle.Compiler/src/main/java/triangle/treeDrawer/LayoutVisitor.java
index d521635..8cd441f 100644
--- a/Triangle.Compiler/src/main/java/triangle/treeDrawer/LayoutVisitor.java
+++ b/Triangle.Compiler/src/main/java/triangle/treeDrawer/LayoutVisitor.java
@@ -162,7 +162,9 @@ public class LayoutVisitor implements ActualParameterVisitor<Void, DrawingTree>,
 	
 	@Override
 	public DrawingTree visitRepeatCommand(RepeatCommand ast, Void obj) {
-		return null;
+		var d1 = ast.E.visit(this);
+		var d2 = ast.C.visit(this);
+		return layoutBinary("RepeatCom.", d1, d2);
 	}
 
 	// Expressions
diff --git a/build/libs/Triangle-Tools.jar b/build/libs/Triangle-Tools.jar
index 8343cc0..1181f38 100644
Binary files a/build/libs/Triangle-Tools.jar and b/build/libs/Triangle-Tools.jar differ
diff --git a/programs/run b/programs/run
index 84ed354..b9170dd 100755
--- a/programs/run
+++ b/programs/run
@@ -1,16 +1,17 @@
 #!/bin/bash
 
-# Term colours for output
+# Term. colours for output
 RED='\033[0;31m'   # Red
 GRN='\033[0;32m'   # Green
+YLLW='\033[0;33m'  # Yellow
 NC='\033[0m'       # No Color
 
-TRI=""
+TRI="" #.tri file
 
 # Check if the input in arg 1 ($1) is empty
 if [ -z "$1" ]
     then # if empty...
-        printf "${RED}Usage: $0 *.tri file (optional: $0 *.tri tree)${NC}"
+        printf "${YLLW}Usage: $0 *.tri file (optional: $0 *.tri tree)${NC}"
         exit 1 # Exit with code 1, failure
     else
         TRI=$1
@@ -19,25 +20,23 @@ fi
 #Remove the extension of the file
 FILENAME=$(echo $TRI | cut -f 1 -d '.')
 
-#TODO: implement tree command
-printf "${GRN}[INFO] Compiling file: $FILENAME.tri to $FILENAME.tam ...${NC}\n"
+printf "${YLLW}[INFO] Compiling file: $FILENAME.tri to $FILENAME.tam ...${NC}\n"
 
 # Compile to tam
 if java -cp ../build/libs/Triangle-Tools.jar triangle.Compiler $FILENAME.tri -o=$FILENAME.tam &> /dev/null #quiet
     then if [ -z "$2" ]
-            then #if empty
+            then #if second arg empty (really im not checking if you put tree)
                 printf "${GRN}[INFO] Running file: $FILENAME.tam ...${NC}\n"
                 java -cp ../build/libs/Triangle-Tools.jar triangle.abstractMachine.Interpreter $FILENAME.tam
                 exit 0
-            else
+            else #youve put tree, so lets see it!
                 printf "${GRN}[INFO] Running file: $FILENAME.tam ... and displaying AST${NC}\n"
                 java -cp ../build/libs/Triangle-Tools.jar triangle.Compiler $FILENAME.tri tree -o=$FILENAME.tam &> /dev/null #quiet
                 exit 0
-    fi
-
-    else
+         fi
+    else #error msg
         printf "${RED}[ERROR] Could not complie $FILENAME.tri ...${NC}"
         err=$(java -cp ../build/libs/Triangle-Tools.jar triangle.Compiler $FILENAME.tri -o=$FILENAME.tam)
         printf "${RED}\n$err\n${NC}"
-        exit 1
+        exit 1 #exit with 1, failure
 fi