diff --git a/pmf-suspend b/pmf-suspend
index 1f8aabb..a914a63 100644
--- a/pmf-suspend
+++ b/pmf-suspend
@@ -1,10 +1,24 @@
 #!/bin/bash
 
+# Run a simulation of the program. Does not lock nor suspend the system.
+SIMULATION=0
+
+# Set params used
+PARAM_1=$1
+PARAM_2=$2
+PARAM_3=$3
+PARAM_4=$4
+
+# Set user
+COMPUTER_USER="stina"
+
 # Help
 if [[ $1 == "help" || $1 == "--help" ]]; then
     echo -e "Usage:
-   pmf-suspend                 Suspend and lock the screen directly
-   pmf-suspend [help|--help]   Show this message
+   pmf-suspend [--help|--simulation|[0-9|0-9|0-9]]
+   pmf-suspend                 Suspend system
+   pmf-suspend help|--help   Show this message
+   pmf-suspend --simulation    Run a simulation of the program, execute nothing.
    pmf-suspend 1 2 3           Timer will be set to 1s, 2m, 3h
    pmf-suspend 0 30            Timer will be set to 30 mintues
 
@@ -22,24 +36,34 @@
 ";
 
    exit 1
+elif [[ $1 == "simulation" || $1 == "--simulation" ]]; then
+    echo "Running a simulation...";
+    PARAM_1=$PARAM_2
+    PARAM_2=$PARAM_3
+    PARAM_3=$PARAM_4
+    SIMULATION=1
 fi
 
-# Check if the user is using sudo.
+# Check if the user is root.
 if [[ $EUID -ne 0 ]]; then
-    echo "This script must be run as root, use \"sudo pmf-suspend\" instead." 1>&2
-    exit 1
+    # Check if the user is running a simulation
+    if [ $SIMULATION == 1 ]; then
+        echo "Usually this script must be run as root, but this is a simulation." 1>&2
+    else
+        echo "This script must be run as root, use \"sudo pmf-suspend\" instead." 1>&2
+        exit 1
+    fi
 fi
 
-
 # Calulcate time
-if [ "$3" != "" ]; then
-    hour=$(($3 * 3600));
+if [ "$PARAM_3" != "" ]; then
+    hour=$(($PARAM_3 * 3600));
 fi
-if [ "$2" != "" ]; then
-    minute=$(($2 * 60));
+if [ "$PARAM_2" != "" ]; then
+    minute=$(($PARAM_2 * 60));
 fi
-if [ "$1" != "" ]; then
-    second=$(($1));
+if [ "$PARAM_1" != "" ]; then
+    second=$(($PARAM_1));
 fi
 
 # Print time and count down
@@ -58,17 +82,19 @@
     echo
 }
 
-# Set user
-user="stina"
-
-if [ $1 != "" ]; then
+if [ $PARAM_1 != "" ]; then
     runCountdown
 fi
 
+# If the user is running a simulation then don't execute any scripts.
+if [ $SIMULATION == 1 ]; then
+    exit 1
+fi
+
 # Execute scripts
 
 # Lock screen
-sudo -u $user gnome-screensaver-command --lock
+sudo -u $COMPUTER_USER gnome-screensaver-command --lock
 
 # Suspend computer
 sudo pm-suspend