Define G$\text{'}\text{'}$: $\{0,1\}^$n $->\{0,1\}^6$n where G$\text{'}\text{'}($x$)$

G$($y$1)||$G$($y$2)||$G$($y$1)$ G$($y$2).$ Is G$\text{'}\text{'}$ still a PRG$?$ If yes, explain why; if not, give an explicit attack that violates the PRG definition.