X% off if customer is placing their first order

Shopify Script - X% off if customer is placing their first order

customer = Input.cart.customer
discount = 0
message = ""
if customer
  if customer.orders_count == 0
    discount = 0.1 #change the discount given here
    message = "Thanks for placing your first order" #change the message shown here
    
end
puts discount
Input.cart.line_items.each do |line_item|
  product = line_item.variant.product
  next if product.gift_card?
  line_item.change_line_price(line_item.line_price * (1-discount), message: message) unless discount == 0
end

Output.cart = Input.cart