"Lateralus" is a song by American progressive metal band Tool. The song is the third single and title track of their third studio album Lateralus.
"Lateralus"  

Single by Tool  
from the album Lateralus  
Released  February 2002  
Format  Compact Disc  
Recorded  2000  
Genre 
 
Length  9:24 (Album version) 5:47 (Radio edit)  
Label  Volcano II, Tool Dissectional  
Songwriter(s)  Danny Carey, Justin Chancellor, Adam Jones, Maynard James Keenan  
Producer(s)  Tool  
Tool singles chronology  
 
Audio sample  
Excerpt of "Lateralus".

The song is known for its distinct time signatures and corresponding lyrical patterns. The time signatures of the chorus of the song change from 9/8 to 8/8 to 7/8; as drummer Danny Carey says, "It was originally titled 987. For the time signatures. Then it turned out that 987 was the 16th number of the Fibonacci sequence. So that was cool."^{[2]}
In a 2001 interview, singer Maynard James Keenan commented on the lyric mentioning black, white, red and yellow: "I use the archetype stories of North American aboriginals and the themes or colors which appear over and over again in the oral stories handed down through generations. Black, white, red, and yellow play very heavily in aboriginal stories of creation."^{[3]}
The song could also be about the order of colors seen while under the influence of LSD. Alex Grey (the visionary artist who did the album artwork for Lateralus) stated that when he closed his eyes on an LSD trip, he saw a black and white spiral, and when he tried it a few more times it became a red and yellow spiral.^{[4]}
The line "As below so above and beyond, I imagine" is a quote from one of the Seven Aphorisms of Summum and is also a direct reference to Hermeticism and the Emerald Tablet.
An interesting side note, in alchemy "The Great Work" begins with the Nigredo (black), then moves to the Albedo (white), then the Citrinitas (yellow), then the Rubedo (Red).
In July 2017 Maynard's friend Joe Rogan described his writing process in a podcast; "He wrote a song to the Fibonacci sequence. The Fibonacci sequence is a mathematical sequence. It starts from 1, the next number is 1, and the next number being 2, creates the 2+1 which is 3, continuing in this mathematical progression. That’s how they found the chord progression. It began linking up to the Fibonacci sequence." The syllables Maynard sings in the first verse follow the first six numbers in the pattern, ascending and descending in the sequence 11235853. "Black (1), then (1), white are (2), all I see (3), in my infancy (5). Red and yellow then came to be (8), reaching out to me (5). Lets me see (3)." In the next verse, Maynard begins with the seventh number of the Fibonacci sequence (13), implying a missing verse in between. He descends back down with the following pattern; 13853. "As below so above and beyond I imagine (13). Drawn beyond the lines of reason (8). Push the envelope (5). Watch it bend (3)." The second verse adds the missing line to complete the sequence; "There is (2), so (1), much (1), more and (2), beckons me (3), to look through to these (5), infinite possibilities (8)." 11235853211235813853.^{[5]}^{[3]}^{[6]}
The song's introduction also ends at the 1 minute and 37 seconds mark, where the first verse then begins. This time is significant, as it is a reference to the Golden Ratio. Rounding the Golden Ratio to four places gives 1.618. When converted to minutes and seconds, 1.618 minutes becomes approximately 1 minute and 37 seconds. This also ties it to the Fibonacci sequence as the ratio of one Fibonacci number to its predecessor tends towards the Golden Ratio. In addition, 1:37 can be rearranged into 13:7, which is significant because 13 is the seventh number in the Fibonacci sequence.
Loudwire listed "Lateralus" as number 1 on the list of the Top 50 Metal Songs of the 21st Century.^{[7]}
Chart (200102)  Peak
position 

US Alternative Songs (Billboard)^{[8]}  18 
US Mainstream Rock (Billboard)^{[9]}  14 
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