Depict Sir John Macpherson, the British colonial governor, seated at a table with the Macpherson Constitution document prominently displayed before him. His expression should be one of focus, symbolizing the importance of the document in Nigeria's constitutional development.
Background: Include a colonial-era government building in the background, with British and Nigerian flags symbolizing the transition from colonial rule to self-governance. In the foreground, incorporate elements like maps, historical documents, and the scales of justice, representing the legal and political significance of the Macpherson Constitution."