Every user that has an EOS account can buy a portion of the wall called slot. A slot is composed by a title, an image and an url to redirect when the slot is clicked.
All the slots are stored in the EOS blockchain and can be updated at anytime by it's owners.
The price of a slot is calculated with the following formula:
Slot price = Pixel price x Slot pixels
The pixel price will change over time automatically depending on the total pixels that had been sold. It is calculated with the following lineal functions:
When, sold pixels <= 800,000 pixels, then:
Pixel price = 0.0015 EOS / 1,000,000 pixels x Pixels sold + 0.0005 EOS
When, sold pixels > 800,000 pixels, then:
Pixel price = 0.003 EOS / 1,000,000 pixels x Pixels sold + 0.0005 EOS