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diff --git a/programming/loops/match_4_for_loop/match_4_for_loop.ino b/programming/loops/match_4_for_loop/match_4_for_loop.ino
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--- /dev/null
+++ b/programming/loops/match_4_for_loop/match_4_for_loop.ino
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+/* Exercise 2, with a WHILE loop
+
+ Test a random number agains a value: 
+ a iteretive loop perform 255 runs to see if a random number in range 0-255
+ is equal tothe target value of 200
+ Light a led in case
+ Light the other LED if a run of 255 test has gone
+ Log the results (if success) trough serialport
+ */
+
+// Data structure
+
+const byte GREEN   = 13  ; // LED for found value
+const byte RED     = 12 ;  // LEAD for restart
+
+const int TARGET   = 200 ;
+long randomNumber = 0L;
+
+// Staff
+const int WAIT = 1000 ;
+const int REST = 10 ;
+byte count = 0 ;
+const byte MAXRUN = 10 ;
+byte totalRun = 0 ;
+
+void setup() {
+  pinMode(RED,OUTPUT);     
+  pinMode(GREEN,OUTPUT); 
+  // Serial stuff
+  Serial.begin(9600);
+  Serial.println("Initializing random sequence, please wait for results.");
+
+  // Random stuff
+  randomSeed(analogRead(0)); // Random initializer
+
+}
+
+void loop() {  // put your main code here, to run repeatedly: 
+  digitalWrite(GREEN, LOW);  
+  digitalWrite(RED, LOW); 
+  // Serial.println(count);
+
+  for (count == 0; count < 255; count++ , delay(REST)) {
+    randomNumber = random(0,255); //Randoom value generated
+    if (randomNumber == TARGET) {  // When we catch the value
+      Serial.print("--> Match found! Counter was at: "); // serial message
+      Serial.println(count);
+      digitalWrite(GREEN, HIGH);
+      delay(WAIT * 5);
+      digitalWrite(GREEN, LOW);
+      count++ ;
+    }
+  }
+
+// Reset routine
+  Serial.println("Counter resetted.");   // serial staff
+  digitalWrite(RED, HIGH);
+  delay(WAIT);
+  count++ ;
+  totalRun++ ;
+
+// Final Exit routine
+  if (totalRun == MAXRUN) {
+    Serial.println("10 runs done, exit program.");
+    digitalWrite(RED, HIGH);
+    delay(WAIT);
+    exit(0);
+  }
+} 
+