These Generatori (Generators) serve to further research on After effects and retinal persistence. They consist of two black discs with transparent stripes and a light source. The rotation of the disks generates an enormous variety of conic curves, which then form various kinds of images, according to the rotation mode. All Generatori di Linee Traccianti (Generators og traces lines) are interactive, in that require participation and manipulation in order to vary the speed of reciprocal rotation of the two discs. They have been presented both in museums and private galleries. They are made in various sizes, with motorized movement.

Antonio Barrese, Afra Canali: Works - Generatori die linee traccianti, In: Gruppo MID 1965 – 2015 Antonio Barrese Alberto Marangoni, p.60 f.
https://www.antoniobarrese.it/pdf/CATALOGO_KANALI.pdf (14.12.2021)