Shopify Script - X$ off if customer accepts marketing

customer = Input.cart.customer
discount = 0
message = ""
if customer
  if customer.accepts_marketing? #determines if the customer accepts marketing
    discount = 1000 #number of Dollars to discount in cents
    message = "Accepts Marketing Discount" #message to customer when they get the discount
  end
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 - Money.new(cents: discount), message: message) unless discount == 0
end

Output.cart = Input.cart