diff --git a/ES/ES assignment 3.pdf b/ES/ES assignment 3.pdf
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diff --git a/ES/ESAssignment3(KnightRider).zip b/ES/ESAssignment3(KnightRider).zip
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diff --git a/ES/main.cpp b/ES/main.cpp
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+#include <Arduino.h>
+
+#define LED_PIN PD7
+#define BUTTON1_PIN PD5
+#define BUTTON2_PIN PD2
+
+#define LED_BUILTIN_MASK (1 << PB5)
+#define LED_EXT_MASK (1 << LED_PIN)
+#define BUTTON1_MASK (1 << BUTTON1_PIN)
+#define BUTTON2_MASK (1 << BUTTON2_PIN)
+
+#define KNIGHT_LED_MASK 0x0F  // PB0–PB3 (pins 8–11)
+
+
+unsigned long prevMillisBlink = 0;
+unsigned long prevMillisDebounce1 = 0;
+unsigned long prevMillisDebounce2 = 0;
+unsigned long prevMillisKnight = 0;
+
+bool ledState = false;
+bool button1State = false;
+bool button2State = false;
+bool lastButton1Reading = false;
+bool lastButton2Reading = false;
+
+int knightIndex = 0;
+bool knightForward = true;
+uint16_t knightStates[] = {
+    0b0001, 0b0010, 0b0100, 0b1000,  // Forward
+    0b0100, 0b0010                   // Backward
+};
+
+uint8_t knightStatesMulti[] = {
+    0b0001,  // 1
+    0b0011,  // 12
+    0b0111,  // 123
+    0b1111,  // 1234
+    0b1110,  // 234
+    0b1100,  // 34
+    0b1000,  // 4
+    0b1100,  // 34
+    0b1110,  // 234
+    0b1111,  // 1234
+    0b0111,  // 123
+    0b0011   // 12
+};
+
+
+void setup() {
+    // Ext. LED op PD7 en button1 op PD5
+    DDRD |= LED_EXT_MASK;
+    DDRD &= ~BUTTON1_MASK;
+
+    // Internal LED op PB5, Knight Rider LEDs op PB0–PB3
+    DDRB |= LED_BUILTIN_MASK | KNIGHT_LED_MASK;
+
+    // Button2 op PD2 met interne pull-up
+    DDRD &= ~BUTTON2_MASK;
+    PORTD |= BUTTON2_MASK;  // interne pull-up aan
+
+    Serial.begin(9600);  // voor debug indien nodig
+}
+
+void loop() {
+    unsigned long currentMillis = millis();
+
+    // ---------- LED blink 4 Hz ----------
+    if (currentMillis - prevMillisBlink >= 125) {
+        prevMillisBlink = currentMillis;
+        ledState = !ledState;
+        if (ledState) {
+            PORTD |= LED_EXT_MASK;
+        } else {
+            PORTD &= ~LED_EXT_MASK;
+        }
+    }
+
+    // ---------- Debounce Button 1 ----------
+    bool reading1 = (PIND & BUTTON1_MASK);
+    if (reading1 != lastButton1Reading) {
+        prevMillisDebounce1 = currentMillis;
+        lastButton1Reading = reading1;
+    }
+    if (currentMillis - prevMillisDebounce1 > 20) {
+        button1State = reading1;
+    }
+
+    // Built-in LED aan als button 1 is ingedrukt
+    if (button1State) {
+        PORTB |= LED_BUILTIN_MASK;
+    } else {
+        PORTB &= ~LED_BUILTIN_MASK;
+    }
+
+    // ---------- Debounce Button 2 ----------
+    bool reading2 = !(PIND & BUTTON2_MASK);
+    if (reading2 != lastButton2Reading) {
+        prevMillisDebounce2 = currentMillis;
+        lastButton2Reading = reading2;
+    }
+    if (currentMillis - prevMillisDebounce2 > 20) {
+        button2State = reading2;
+    }
+
+    // ---------- Knight Rider ----------
+    if (currentMillis - prevMillisKnight >= 100) {
+        prevMillisKnight = currentMillis;
+
+        uint16_t value;
+        if (button2State) {
+            value = knightStates[knightIndex];  // niet ingedrukt → single (6 elementen)
+            knightIndex = (knightIndex + 1) % 6;
+        } else {
+            value = knightStatesMulti[knightIndex];  // ingedrukt → multi (12 elementen)
+            knightIndex = (knightIndex + 1) % 12;
+        }
+
+        PORTB &= ~KNIGHT_LED_MASK;
+        PORTB |= (value & KNIGHT_LED_MASK);
+    }
+}