diff --git a/.DS_Store b/.DS_Store
index 5008ddf..62ff0fe 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/Week1/.DS_Store b/Week1/.DS_Store
new file mode 100644
index 0000000..b3f8745
Binary files /dev/null and b/Week1/.DS_Store differ
diff --git a/Week1/prep-exercises/.DS_Store b/Week1/prep-exercises/.DS_Store
new file mode 100644
index 0000000..550fbe4
Binary files /dev/null and b/Week1/prep-exercises/.DS_Store differ
diff --git a/Week1/prep-exercises/1-traffic-light/traffic-light-1.js b/Week1/prep-exercises/1-traffic-light/traffic-light-1.js
index f1d9169..afb1ad2 100644
--- a/Week1/prep-exercises/1-traffic-light/traffic-light-1.js
+++ b/Week1/prep-exercises/1-traffic-light/traffic-light-1.js
@@ -12,10 +12,15 @@ while (rotations < 2) {
   const currentState = trafficLight.state;
   console.log("The traffic light is on", currentState);
 
-  // TODO
-  // if the color is green, turn it orange
-  // if the color is orange, turn it red
-  // if the color is red, add 1 to rotations and turn it green
+  if (currentState === "green") {
+    trafficLight.state = "orange" ; 
+  
+  }else if (currentState=== "orange") {
+    trafficLight.state= "red"; 
+  } else if (currentState === "red") {
+    rotations++;
+    trafficLight.state= "green" ;
+  }
 }
 
 /**
diff --git a/Week1/prep-exercises/1-traffic-light/traffic-light-2.js b/Week1/prep-exercises/1-traffic-light/traffic-light-2.js
index 8c6ba95..115e45e 100644
--- a/Week1/prep-exercises/1-traffic-light/traffic-light-2.js
+++ b/Week1/prep-exercises/1-traffic-light/traffic-light-2.js
@@ -6,28 +6,32 @@
  */
 const trafficLight = {
   possibleStates: ["green", "orange", "red"],
-  stateIndex: 0,
+  stateIndex: 0, 
 };
-
+localStorage
 let cycle = 0;
-while (cycle < 2) {
+
+while (cycle < 2) { 
   const currentState = trafficLight.possibleStates[trafficLight.stateIndex];
   console.log("The traffic light is on", currentState);
 
-  // TODO
-  // if the color is green, turn it orange
-  // if the color is orange, turn it red
-  // if the color is red, add 1 to cycles and turn it green
+  
+  if (trafficLight.stateIndex === 0) { 
+    trafficLight.stateIndex = 1; 
+  } else if (trafficLight.stateIndex === 1) { 
+    trafficLight.stateIndex = 2; 
+  } else if (trafficLight.stateIndex === 2) { 
+    cycle++; 
+    trafficLight.stateIndex = 0; 
+  }
 }
 
 /**
- * The output should be:
-
-The traffic light is on green
-The traffic light is on orange
-The traffic light is on red
-The traffic light is on green
-The traffic light is on orange
-The traffic light is on red
-
-*/
+ * The expected output:
+ * The traffic light is on green
+ * The traffic light is on orange
+ * The traffic light is on red
+ * The traffic light is on green
+ * The traffic light is on orange
+ * The traffic light is on red
+ */
diff --git a/Week2/prep-exercises/1-traffic-light/traffic-light.js b/Week2/prep-exercises/1-traffic-light/traffic-light.js
index f4a5c1a..04b6fc3 100644
--- a/Week2/prep-exercises/1-traffic-light/traffic-light.js
+++ b/Week2/prep-exercises/1-traffic-light/traffic-light.js
@@ -6,19 +6,15 @@
  */
 
 function getCurrentState(trafficLight) {
-  // TODO
-  // Should return the current state (i.e. colour) of the `trafficLight`
-  // object passed as a parameter.
+  return trafficLight.possibleStates[trafficLight.stateIndex];
 }
 
 function getNextStateIndex(trafficLight) {
-  // TODO
-  // Return the index of the next state of the `trafficLight` such that:
-  // - if the color is green, it will turn to orange
-  // - if the color is orange, it will turn to red
-  // - if the color is red, it will turn to green
+
+  return (trafficLight.stateIndex + 1) % trafficLight.possibleStates.length;
 }
 
+
 // This function loops for the number of seconds specified by the `secs`
 // parameter and then returns.
 // IMPORTANT: This is not the recommended way to implement 'waiting' in
diff --git a/Week2/prep-exercises/2-experiments/index.js b/Week2/prep-exercises/2-experiments/index.js
index 7e5aa92..8d5fd7c 100644
--- a/Week2/prep-exercises/2-experiments/index.js
+++ b/Week2/prep-exercises/2-experiments/index.js
@@ -3,27 +3,18 @@
 function runExperiment(sampleSize) {
   const valueCounts = [0, 0, 0, 0, 0, 0];
 
-  // TODO
-  // Write a for loop that iterates `sampleSize` times (sampleSize is a number).
-  // In each loop iteration:
-  //
-  // 1. Generate a random integer between 1 and 6 (as if throwing a six-sided die).
-  // 2. Add `1` to the element of the `valueCount` that corresponds to the random
-  //    value from the previous step. Use the first element of `valueCounts`
-  //    for keeping a count how many times the value 1 is thrown, the second
-  //    element for value 2, etc.
-
+  for (let i = 0; i < sampleSize; i++) {
+    const roll = Math.floor(Math.random() * 6);
+  
+   valueCounts[roll]++;
+  }
   const results = [];
 
-  // TODO
-  // Write a for..of loop for the `valueCounts` array created in the previous
-  // loop. In each loop iteration:
-  // 1. For each possible value of the die (1-6), compute the percentage of how
-  //    many times that value was thrown. Remember that the first value of
-  //    `valueCounts` represent the die value of 1, etc.
-  // 2. Convert the computed percentage to a number string with a precision of
-  //    two decimals, e.g. '14.60'.
-  // 3. Then push that string onto the `results` array.
+  for (const count of valueCounts) {
+    const percentage = ((count / sampleSize) * 100).toFixed(2);
+    results.push(percentage);
+  }
+
 
   return results;
 }