The given code is crafted to blink my first name in morse code using LED.
S, H, A, L, O, K.

... = S

.... = H

._ = A

._.. = L

... = O

. = K

Here, one second of high LED is referred as a dots and three seconds of high LED is referred to dashes.
When the LED is low for one second, it indicates the space between parts of the letter.
When the LED is low for three seconds, it indicates the space between letters.