The tool [PETSCII2BASIC](https://csdb.dk/release/?id=198624), in combination with [Marc's PETSCII Editor](http://www.kameli.net/marq/?page_id=2717), is probably what you are looking for. The editor allows you to draw a PETSCII, and PETSCII2BASIC converts it into BASIC code, taking care of printing the PETSCII characters correctly.