As you may not be aware, the top 9 stories of the tower will be an LED art piece designed by Jim Cambell:

"The upper two-thirds of the [building] crown consists of perforated aluminum panels. [...] The exterior of the aluminum panels will be lit with 11,000 LED lights, which will display low-resolution moving color imagery. The images would be a combination of pre-recorded images and those taken from cameras surrounding the City. The crown of the tower also incorporates three internal lighting systems."

https://sf.curbed.com/2017/5/4/15551324/salesforce-tower-led...