3.2: Carousel Optional captions example
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**Primary Actor**: User

**Scope**: Ngx-bootstrap DEMO / BS version 3&4

**Goal**: Show user carousel with captions example

Main success scenario:
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1. User open Carousel demo page
2. User click on Optional captions sub-menu
3. User see carousel component with 3 slides and 2 arrows: left, right
4. User see header and info inside each slide
5. When user click on left arrow - previous slide and info shown
6. When user click on right arrow - next slide and info shown
7. When user do nothing more than 5 sec - next slide automatically shown with appropriate info inside

Variations:
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2*. User scroll to Optional captions sub-menu