I think it's a female zebra spider (Salticus scenicus) [no comma] since it has really large eyes in the front in order to spot the prey and uses its jumping ability to capture prey [repeated 'it' is ambiguous]. This kind of spider is usually black and covered with white stripes. The most interesting thing about the zebra spiders, which amazes me, is their awareness of being observed. Thus, if you take a close look of at one of them, it will [removing will works better with the 'and' later on] lifts its head as a respond in response and looks straight back at you --- which is obvious in both pictures you took!