static int middle_w = 0;
static int middle_h = 0;

void setup() {
    chipName("74LS04");
    logicFamily(TTL);
    pin(1, "1A");
    pin(2, "Y1", OUTPUT);
    pin(3, "2A");
    pin(4, "Y2", OUTPUT);
    pin(5, "3A");
    pin(6, "Y3", OUTPUT);
    pin(7, "GND", GROUND);
    pin(8, "Y4", OUTPUT);
    pin(9, "4A");
    pin(10, "Y5", OUTPUT);
    pin(11, "5A");
    pin(12, "Y6", OUTPUT);
    pin(13, "6A");
    pin(14, "VCC", POWER);
}

static bool a[6];

void loop() {
    // Read the first input pin
    a[0] = digitalRead(1);
    // Write the negation of the first input pin to the first output pin
    digitalWrite(2, !a[0]);

    // Repeat the logic for the remaining pins
    a[1] = digitalRead(3);
    digitalWrite(4, !a[1]);
    
    a[2] = digitalRead(5);
    digitalWrite(6, !a[2]);

    a[3] = digitalRead(9);
    digitalWrite(8, !a[3]);
    
    a[4] = digitalRead(11);
    digitalWrite(10, !a[4]);

    a[5] = digitalRead(13);
    digitalWrite(12, !a[5]);
}

#define RED 255, 0, 0
#define GREEN 0, 255, 0

// Define the draw function
void draw(){
    // Left
    // Loop through each buffer symbol
    for (int i = 0; i < 3; i++) {
        int y_offset = 65 * i + 15;  // Vertical position offset for each symbol

        // Draw Post 1
        drawLine(26, y_offset, 35, y_offset);
        drawLine(35, y_offset, 35, y_offset + 7);

        // Draw Post 2
        drawLine(26, y_offset + 33, 35, y_offset + 33);
        drawLine(35, y_offset + 33, 35, y_offset + 27);

        // Draw Triangle
        drawTriangle(28, y_offset + 6, 42, y_offset + 6, 35, y_offset + 20);

        // Set color based on a values (a1, a2, a3)¿
        if (!a[i])
            setColor(GREEN);
        else
            setColor(RED);

        // Draw Fill
        fillTriangle(30, y_offset + 7, 40, y_offset + 7, 35, y_offset + 18);

        // Reset the color
        setDefaultColor();

        // Draw Dot
        drawCircle(35, y_offset + 23, 2);
    }

    // Right Side
    // Loop through each buffer symbol
    int offset = 0;
    for (int i = 0; i < 3; i++) {
        int y_offset = 64 * i + 48;  // Vertical position offset for each symbol

        // Draw Post 1
        drawLine(68, y_offset, 59, y_offset);            // x, y -> x, y for Post 1
        drawLine(59, y_offset, 59, y_offset + 6);        // Vertical line

        // Draw Post 2
        drawLine(68, y_offset + 33, 59, y_offset + 33);  // x, y -> x, y for Post 2
        drawLine(59, y_offset + 33, 59, y_offset + 27);  // Vertical line

        // Draw Triangle
        drawTriangle(53, y_offset + 6, 65, y_offset + 6, 59, y_offset + 21);  // Coordinates for the triangle

        // Set color based on a_values[i]
        // --> First iter: target index = 5, i = 0, constant = 5, offset = 0
        // --> Second iter: target index = 4, i = 1, constant = 5, offset = 2
        // --> Third iter: target index = 3, i = 2, constant = 5, offset = 4
        if (!a[i + 5 - offset])
            setColor(GREEN);
        else
            setColor(RED);

        // Draw Fill
        fillTriangle(54, y_offset + 7, 64, y_offset + 7, 59, y_offset + 19);  // Filled triangle

        // Reset the color
        setDefaultColor();

        // Draw Dot
        drawCircle(59, y_offset + 23, 2);  // Circle at the base of the symbol

        // Update the offset
        offset += 2;
    }
}