cannot workout how to link

 for (const pickaxe of pickaxes) {
        const pickaxeIndex = inventory.findIndex(item => item.name === pickaxe.name);
        if (pickaxeIndex !== -1) {
            // Found the lowest-tier pickaxe in the inventory
            destroyedPickaxe = pickaxe.name;
            inventory.splice(pickaxeIndex, 1);
            break;
        }
    }

        let pickaxeTier = ""; // Initialize a variable to store the pickaxe tier

        if (inventory.some(item => item.name === "Stone Pickaxe")) {
            pickaxeTier = "Tier 1";
        } else if (inventory.some(item => item.name === "Iron Pickaxe")) {
            pickaxeTier = "Tier 2";
        } else if (inventory.some(item => item.name === "Diamond Tipped Pickaxe")) {
            pickaxeTier = "Tier 3";
        } else if (inventory.some(item => item.name === "Obsidian Tipped Pickaxe")) {
            pickaxeTier = "Tier 4";
        }
        let destroyedPickaxe = null; // Initialize the variable here
        // Destroy the lowest-tier pickaxe that the user is currently using
        if (destroyedPickaxe === "Stone Pickaxe") {
            const pickaxeIndex = inventory.findIndex(item => item.name === "Stone Pickaxe");
            if (pickaxeIndex !== -1) {
                inventory.splice(pickaxeIndex, 1);
            }
        } else if (destroyedPickaxe === "Iron Pickaxe") {
            const pickaxeIndex = inventory.findIndex(item => item.name === "Iron Pickaxe");
            if (pickaxeIndex !== -1) {
                inventory.splice(pickaxeIndex, 1);
            }
        } else if (destroyedPickaxe === "Diamond Tipped Pickaxe") {
            const pickaxeIndex = inventory.findIndex(item => item.name === "Diamond Tipped Pickaxe");
            if (pickaxeIndex !== -1) {
                inventory.splice(pickaxeIndex, 1);
            }
        } else if (destroyedPickaxe === "Obsidian Tipped Pickaxe") {
            const pickaxeIndex = inventory.findIndex(item => item.name === "Obsidian Tipped Pickaxe");
            if (pickaxeIndex !== -1) {
                inventory.splice(pickaxeIndex, 1);
            }
        }