A computer-implemented method implemented via the Internet for coordinating a current or future event between a user of a mobile Internet device and other users communicating through the Internet. The crosslinked solid type pressure-sensitive adhesive composition comprising a rubbery polymer, a tackifier, and a crosslinking agent comprising at least one member selected from the group consisting of thiuram vulcanizing agents, quinoid vulcanizing agents, quinone dioxime vulcanizing agents, and maleimide vulcanizing agents. Rotation of the holographic diffraction pattern generates a display using the diffracted light from the holographic diffraction grating.