diff --git a/SmartPowerDevice/lightsensitive controll/RE b/SmartPowerDevice/lightsensitive controll/RE
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--- a/SmartPowerDevice/lightsensitive controll/RE	
+++ /dev/null
@@ -1,8 +0,0 @@
-## lightsensitive controll
-
-### hardware
-
-
-### software (arduino code)
-
-
diff --git a/SmartPowerDevice/lightsensitive controll/README.md b/SmartPowerDevice/lightsensitive controll/README.md
new file mode 100644
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+++ b/SmartPowerDevice/lightsensitive controll/README.md	
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+## lightsensitive controll
+
+### hardware
+
+
+### software (arduino code)
+
+// arduino-light-sensor-triggers-relay incl delay counter 
+
+// constants won't change
+const int LIGHT_SENSOR_PIN = A0; // Arduino pin connected to light sensor's  pin
+const int RELAY_PIN        = 3;  // Arduino pin connected to Relay's pin
+const int ANALOG_THRESHOLD = 450;  
+
+// variables will change:
+int analogValue;
+
+void setup() {
+  pinMode(RELAY_PIN, OUTPUT); // set arduino pin to output mode
+    Serial.begin(9600);
+
+}
+
+void loop() {
+  analogValue = analogRead(LIGHT_SENSOR_PIN); // read the input on analog pin
+    float voltage = analogValue * (5.0 / 1023.0);
+
+       Serial.println(analogValue);
+
+  int var = 0; 
+  while (var < 5 && analogValue < ANALOG_THRESHOLD) { 
+               delay(1000); 
+               var++; }
+               
+  if(var=5 && analogValue < ANALOG_THRESHOLD) { 
+                   digitalWrite(RELAY_PIN, LOW); } // turn off Relay 
+
+    else {
+    digitalWrite(RELAY_PIN, HIGH); 
+    var = 0;
+           }
+       }
+