Since a monitor is composed of pixels, and each pixel can produce a fixed amount of colours, we could simply instruct the computer to produce all possible combinations of these. It would be a “movie” that would have everything it could display! Almost anything would be in there… Let’s get down to the math.
According to my “research” a 1280 x 1024 monitor has 1,310,720 pixels. It also produces approximately 32 million colours. Therefore the amount of combinations we have is equal to (32 * 10^6)^1310720. We can estimate 32^1310720 by taking the logarithm in base 10 of 32, which is approximately 1.5. This means 32 ~ 10^(1.5) where ~ stands for “is approximately equal to”. Therefore we have 10^(1.5)^(1310720) = 10^(1966080). Now we multiply by the remaining 10^(7864320) to obtain 10^(9830400) combinations. Whew!
Now a difficult part is settling about how many frames per second would this program display. Let us assume it is reasonable to give 0.001 seconds for an iteration of the rightmost pixel (the one constantly changing). That gives 32 * 10^6 frames in 10^(-3) seconds, which is 32 * 10^9 frames per second. Let’s again estimate this number as 10^(10.5) fps.
Therefore to display our movie the computer will take 10^(9830389.5) seconds! One year has 31,556,926 seconds which we estimate to 10^(7.5). Therefore it will take 10^(9830382) years to display all combinations. That’s 1 followed by 9830382 zeros. If we estimate the age of the universe to 10^(10.15) years (using 14 billion years and rounding log 14), it’s 9830371.85 times the age of the universe! That’s almost 10 million times older than the universe. I think we’re gonna have to wait for a while to see anything meaningful.
Disclaimer: not completely sure about the math, you better check that up.
