If you take the code from here, be sure to heart and star this project. (No need for credit but credit appreciated.)
Stamp mode makes each heart stamped out, causing them not affect the clone limit, allowing for 'infinite hearts', but as a downside, will interfere with any other asset in a project that involves the 'pen' extension, because this project contains the 'erase all' block, which erases anything drawn with pen. Clone mode stops the hearts from interfering with 'pen' assets, and looks much clearer, but will greatly affect the 'max clone limit' if used with large amounts of hearts
