These abstract symbols appear as marked movements in the air, a direct intention by Wyn Evans who was greatly influenced by Japanese Noh theatre and choreology—the practice of turning dance into notational form.
Other site-specific installations by the aritst include Arr/Dep (imaginary landscape for the birds) at the Headquarters of Lufthansa in Frankfurt (2006) and E=V=E=N=T (2015), a sculpture commissioned for Malmö Live. You can visit his installation, which was produced for the Tate Britain Commission with support from Sotheby’s, until August 20, 2017. (via Dezeen)