BUDAPEST, Nov. 23 (Xinhua) -- Light projection is shown on the facade of the Hungarian Science Academy as a side event of the World Science Forum in Budapest, Hungary.

Light projection is shown on the facade of the Hungarian Science Academy as a side event of the World Science Forum in Budapest, Hungary. (Photo by Attila Volgyi/Xinhua)

A viewer watches a light projection shown on the facade of the Hungarian Science Academy as a side event of the World Science Forum in Budapest, Hungary. (Photo by Attila Volgyi/Xinhua)

Viewers watch a light projection shown on the facade of the Hungarian Science Academy as a side event of the World Science Forum in Budapest, Hungary. (Photo by Attila Volgyi/Xinhua)

Light projection is shown on the facade of the Hungarian Science Academy as a side event of the World Science Forum in Budapest, Hungary. (Photo by Attila Volgyi/Xinhua)

Light projection is shown on the facade of the Hungarian Science Academy as a side event of the World Science Forum in Budapest, Hungary. (Photo by Attila Volgyi/Xinhua)