Dopamine and schizophrenia synapse diagram

I want an illustrated diagram explaining the roles of dopamine and D2 receptors in the synaptic cleft between neurons, and how they relate to schizophrenia. Antipsychotic drugs exert their effects by blocking D2 receptors. Please diagram this for the three cases: healthy person | hallucination and delusion state | under antipsychotic medication. Generate a horizontally oriented image.