I guess you mean "Hagamos una peli", wich translation is "let's make a movie"
"Un" and "una" are indefinite articles in Spanish, used to indicate a singular, unspecified noun. "Un" is used before masculine nouns, while "una" is used before feminine nouns. For example, "un libro" (a book) and "una mesa" (a table). The choice between "un" and "una" depends on the gender of the noun being referred to.
It is "un lápiz" in Spanish. The word "lápiz" is masculine, so it takes the article "un" rather than "una."
Una cacerola; un cazo; una cazuela
Conus peli was created in 1996.
Alexander Peli died in 2007.
Alexander Peli was born in 1915.
Oren Peli was born in 1970.
Echidna peli was created in 1856.
Bracha Peli was born in 1892.
Bracha Peli died in 1986.
La peli was created in 2006.