AMES, Iowa (AP) — Percy Gibson laid out a simple goal for himself in his first start for Iowa State.”I just wanted to come in and make as much impact as I could early so we could just keep the team going,” the freshman said.He did exactly that. Gibson scored 13 of his 15 points in the first half and Iowa State broke out of a two-game shooting slump with an 84-59 victory over Prairie View A&M on Tuesday night. Gibson started in place of Royce White, the team’s leading scorer and rebounder, and came up big in helping the Cyclones (6-3) regain their touch after shooting just 39 percent in consecutive losses to Northern Iowa and Michigan. White did not start because he was 3 minutes late for the morning shoot-around.Chris Allen had 16 points for the Cyclones, who shot 55 percent in the first half and 52 percent for the game. White, who entered the game after the first media timeout, and Tyrus McGee each added 12 points. Jourdan DeMuynck’s 18 points led Prairie View (2-7), which lost its seventh straight.