diff --git a/src/main/scala/scim/components/Behaviour.scala b/src/main/scala/scim/components/Behaviour.scala
index 0746325..d2a40f8 100644
--- a/src/main/scala/scim/components/Behaviour.scala
+++ b/src/main/scala/scim/components/Behaviour.scala
@@ -2,6 +2,7 @@ package scim.components
 
 import scim.datastruct.{Cell, FunctionArgs, SimulationBehaviours, Time}
 import scim.lib.numberUtil._
+import scim.lib.mapUtil._
 import scim.lib.behaviourUtil._
 import scim.lib.simInterfaces.SimulationBehaviour
 
@@ -10,30 +11,96 @@ import scala.util.Random
 package object behaviour {
 
   val behaviours = SimulationBehaviours(Map[String, SimulationBehaviour](
+    "measureGeneric" -> measureGeneric,
     "measureTemp" -> measureTemp,
     "measureHumid" -> measureHumid,
     "noOutput" -> noOutput,
+    "randomOutput" -> randomOutput,
+    "measureTempFault" -> measureTempFault,
     "fluctuate" -> fluctuate,
     "change" -> change,
     "humidFromTemp" -> humidFromTemp
   ))
 
+  def measureGeneric: SimulationBehaviour = {
+    sensorFactory(Vector(0, 1), 0.1, 0.1, 0.0)
+  }
+
   def measureTemp: SimulationBehaviour = {
     sensorFactory(Vector(-50, 150), 0.1, 1.0, 0.0)
   }
 
   def measureHumid: SimulationBehaviour = {
-    sensorFactory(Vector(0, 100), 1.0, 2.0, 0.0)
+    sensorFactory(Vector(5, 100), 1.0, 2.0, 0.0)
+  }
+
+  def measureTempFault: SimulationBehaviour = {
+    sensorModifierFactory("accuracy", Vector(-10, 10), 5, 15.0, 20.0, measureTemp)
   }
 
   def noOutput: SimulationBehaviour = {
     (_: Cell, _: Time, _: Option[Double], _: Option[FunctionArgs]) => { None }
   }
 
+  def randomOutput: SimulationBehaviour = {
+    randomOutputFactory(Vector(-50, 50))
+  }
+
+  def randomOutputFactory(defaultRange: Vector[Double]) : SimulationBehaviour = {
+    (_: Cell, _: Time, _: Option[Double], args: Option[FunctionArgs]) => {
+      val range: Vector[Double] = args.getParam("range", defaultRange)
+      val rng = new Random()
+      val start = range(0).intValue()
+      val end = range(1).intValue()
+      val rngRange = start + rng.nextInt((end - start) + 1)
+      Some((rngRange.doubleValue() + rng.nextDouble() * (if (rng.nextBoolean()) -1 else 1)).range(range(0), range(1)))
+    }
+  }
+
+  def sensorModifierFactory(defaultMod: String, modRange: Vector[Double], modResolution: Double, modAccuracy: Double, modOffset: Double,
+                            behaviour: SimulationBehaviour): SimulationBehaviour = {
+    def modifyArgs(args: Option[FunctionArgs]): Option[FunctionArgs] = {
+      val modifier: Option[Map[String, Any]] = args.getParam("modifier")
+      if (!modifier.isEmpty) {
+        val modType = modifier.get.getKeyOrElse[String]("type", defaultMod)
+        // TODO: use interface to replace args
+        val newArgs = modType match {
+          case "range" => args.get.args + ("range" -> modifier.get.getKeyOrElse[Vector[Double]]("value", modRange))
+          case "resolution" => args.get.args + ("resolution" -> modifier.get.getKeyOrElse[Double]("value", modResolution))
+          case "accuracy" => args.get.args + ("accuracy" -> modifier.get.getKeyOrElse[Double]("value", modAccuracy))
+          case "offset" => args.get.args + ("offset" -> modifier.get.getKeyOrElse[Double]("value", modOffset))
+        }
+        Some(FunctionArgs(newArgs))
+      } else {
+        None
+      }
+    }
+
+    val modifierWrapper: SimulationBehaviour = (cell: Cell, time: Time, inTruth: Option[Double], args: Option[FunctionArgs]) => {
+      val modifier: Option[Map[String, Any]] = args.getParam("modifier")
+      if (!modifier.isEmpty) {
+        val x = modifier.get.getKey[Int]("x")
+        val y = modifier.get.getKey[Int]("y")
+        val timeMod = modifier.get.getKey[Int]("time")
+        (timeMod, x, y) match {
+          case (timeFault, None, None) if (!timeFault.isEmpty && timeFault.get == time.time) => behaviour(cell, time, inTruth, modifyArgs(args))
+          case (None, xVal, yVal) if (!xVal.isEmpty && !yVal.isEmpty && Cell(xVal.get, yVal.get) == cell) => behaviour(cell, time, inTruth, modifyArgs(args))
+          case (timeFault, xVal, yVal) if (!timeFault.isEmpty && timeFault.get == time.time && !xVal.isEmpty && !yVal.isEmpty && Cell(xVal.get, yVal.get) == cell) =>
+            behaviour(cell, time, inTruth, modifyArgs(args))
+          case _ => behaviour(cell, time, inTruth, args)
+        }
+      } else {
+        behaviour(cell, time, inTruth, args)
+      }
+    }
+
+    modifierWrapper
+  }
+
   def sensorFactory(defaultRange: Vector[Double], defaultResolution: Double, defaultAccuracy: Double, defaultOffset: Double,
+                    altFunction: Option[SimulationBehaviour] = None,
                     preFunction: Option[SimulationBehaviour] = None,
-                    postFunction: Option[SimulationBehaviour] = None,
-                    altFunction: Option[SimulationBehaviour] = None): SimulationBehaviour = {
+                    postFunction: Option[SimulationBehaviour] = None): SimulationBehaviour = {
 
     val genericSensor: SimulationBehaviour = (cell: Cell, time: Time, inTruth: Option[Double], args: Option[FunctionArgs]) => {
       // can use altFunction to entirely disable normal behaviour (including pre/postFunction)
@@ -67,22 +134,43 @@ package object behaviour {
     genericSensor
   }
 
+  def sensorFactoryBehaviour(default: SimulationBehaviour,
+                    altFunction: Option[SimulationBehaviour] = None,
+                    preFunction: Option[SimulationBehaviour] = None,
+                    postFunction: Option[SimulationBehaviour] = None): SimulationBehaviour = {
+
+    val genericSensor: SimulationBehaviour = (cell: Cell, time: Time, inTruth: Option[Double], args: Option[FunctionArgs]) => {
+      val altResult = if (!altFunction.isEmpty) altFunction.get(cell, time, inTruth, args) else None
+      if (!altResult.isEmpty) {
+        altResult
+      } else {
+        val preResult = if (!preFunction.isEmpty) preFunction.get(cell, time, inTruth, args) else inTruth
+        if (preResult.isEmpty) {
+          None
+        } else {
+          val result = default(cell, time, inTruth, args)
+          if (!postFunction.isEmpty) postFunction.get(cell, time, result, args) else result
+        }
+      }
+    }
+
+    genericSensor
+  }
+
   def fluctuate (cell: Cell, time: Time, inTruth: Option[Double], args: Option[FunctionArgs]): Option[Double] = {
     if(inTruth.isEmpty) return None
     val range: Double = args.getParam("range", 1.0)
     val center: Vector[Int] = args.getParam("center", Vector(0, 0))
-    val distOffset: Double = args.getParam("distOffset", 0)
-    val offsetTimes: Vector[Int] = args.getParam("time", Vector(-1))
-    val offset = if(distOffset != 0 && offsetTimes.contains(time.time)) {
+    val distOffset: Option[Double] = args.getParam[Double]("distOffset")
+    val offsetTimes: Option[Vector[Int]] = args.getParam[Vector[Int]]("time")
+    val offset = if(!distOffset.isEmpty && offsetTimes.get.contains(time.time)) {
       val centerCell = Cell(center(0), center(1))
-      centerCell.distance(cell) * distOffset
+      centerCell.distance(cell) * distOffset.get
     } else { 0 }
 
     val rng = new Random()
     val rngRange = rng.nextDouble() * range * (if (rng.nextBoolean()) -1 else 1)
 
-    //if(time.time == 0 || time.time == 11) println("\nXXX: " + cell + " :: " + inTruth.get + " :OFF: " + offset + " :RES: " + (inTruth.get + rngRange + offset))
-
     Some(inTruth.get + rngRange + offset)
 
   }
@@ -93,16 +181,16 @@ package object behaviour {
     val target: Double = args.getParam("target", inTruth.get + 5)
     val targetTime: Int = args.getParam("targetTime", time.time + 1)
     val center: Vector[Int] = args.getParam("center", Vector(0, 0))
-    val distOffset: Double = args.getParam("distOffset", 0)
-    val offsetTimes: Vector[Int] = args.getParam("time", Vector(-1))
+    val distOffset: Option[Double] = args.getParam[Double]("distOffset")
+    val offsetTimes: Option[Vector[Int]] = args.getParam[Vector[Int]]("time")
     // always calculate offset for target
-    val offset = if(distOffset != 0) {
+    val offset = if(!distOffset.isEmpty) {
       val centerCell = Cell(center(0), center(1))
-      centerCell.distance(cell) * distOffset
+      centerCell.distance(cell) * distOffset.get
     } else { 0 }
 
     // only change truth on offsetTimes
-    val truth = if(offsetTimes.contains(time.time)) inTruth.get + offset else inTruth.get
+    val truth = if(!offsetTimes.isEmpty && offsetTimes.get.contains(time.time)) inTruth.get + offset else inTruth.get
 
     val rng = new Random()
     val rngRange = rng.nextDouble() * range * (if (rng.nextBoolean()) -1 else 1)