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// Instantiate the first seg7 module (HEX0 display)
    seg7 display0 (
        .bcd(switches[3:0]), // Lower 4 bits of switches (SW3-SW0)
        .leds(hex0)          // Connects to HEX0 display
    );

    // Instantiate the second seg7 module (HEX1 display)
    seg7 display1 (
        .bcd(switches[7:4]), // Upper 4 bits of switches (SW7-SW4)
        .leds(hex1)          // Connects to HEX1 display
    );