8. The method of claim 1 , further comprising, in response to an input from the second user, generating a hybrid digital drawing by combining the second stroke with a portion of the digital drawing that was previously created by the first user.
8. The method of claim 1 , further comprising, in response to an input from the second user, generating a hybrid digital drawing by combining the second stroke with a portion of the digital drawing that was previously created by the first user. 9. The method of claim 8 , wherein the input from the second user comprises a time threshold for completing the another version of the digital drawing, and further comprising determining the portion of the digital drawing used to generate the hybrid digital drawing based on the time threshold.