Cycle through last 2 copied text (please help)

[ForDefault]

I just want a script that will rotate between the last 2 (non pinned) text in the clipboard.
Fairly simple: textA is copied first and textB second. I push my macro key and it moves textA to the current copied text. I press again and it moves textB back to the current copied text in clipboard.
Any help would be greatly appreciated.
My attempt below:

var current = currentItem(); // Current item index
var secondToLast = -1; // Placeholder for second-most recent non-pinned item

// Ensure we're in the correct tab
var clipboardTab = 'Clipboard'; // Default tab name
if (selectedTab() != clipboardTab) {
    popup('Switching to tab: ' + clipboardTab);
    selectTab(clipboardTab);
}

// Function to find the next unpinned item
function findNextUnpinned(startIndex) {
    var index = (startIndex + 1) % count(); // Wrap around the clipboard
    while (index !== startIndex) {
        if (read(index, plugins.itempinned.mimePinned) === '') {
            return index;
        }
        index = (index + 1) % count();
    }
    return -1; // No unpinned items found
}

// Get the second-to-last unpinned item
secondToLast = findNextUnpinned(current);

// If valid second-to-last item found, toggle between the two
if (secondToLast !== -1) {
    // Select the second-to-last item
    select(secondToLast);

    // If the second-to-last was already selected, toggle back to current
    if (currentItem() === secondToLast) {
        select(current);
    }
    copy(); // Update clipboard with the new selection
} else {
    popup('No unpinned items available to toggle.');
}