Lindex key index
Returns the element at index index in the list stored at key. The index is zero-based, so 0 means the first element, 1 the second element and so on. Negative indices can be used to designate elements starting at the tail of the list. Here, -1 means the last element, -2 means the penultimate and so forth.
When the value at key is not a list, an error is returned.
Bulk string reply: the requested element, or nil when index is out of range.
redis> LPUSH mylist "World"(integer) 1
redis> LPUSH mylist "Hello"(integer) 2
redis> LINDEX mylist 0"Hello"
redis> LINDEX mylist -1"World"
redis> LINDEX mylist 3(nil)