If you're looking for clemency instead of a loan, head over and check out the etters for misbehavior, social slights, workplace issues and personal apologies. The new forms can help atone for troublesome or delinquent behavior at work, school or in the community. These include apologies for graffiti, interruptions, tardiness, and violent behavior. I advise using these as launch points to give you ideas for more personal, specific apologies.
Adobe Illustrator is the best option because graphics are vectors, meaning you can size and resize your images without making them pixelated. You can create poster sized images or cake toppers with the same graphic and the quality of the graphic won't be affected.