Yellow tape and colored lines
Thanks for the picture provided. They are color coded and associated to ethnicity.
Yellow (the tape) for Asians
Chalk line for White people
The pavement for Black people
and the red (blood) for Native Americans or Hispanics.
They all show a unity of working together to showcase a murder, possibly due to racism. Colors working together from a crime due to conflict against color?
Kendrick refers back to this in the next two lines.
To help improve the meaning of these lyrics, visit "Fuck Your Ethnicity" by Kendrick Lamar Lyrics and leave a comment on the lyrics box