function mario:movement(dt)
	local maxrunspeed = maxrunspeed
	local maxwalkspeed = maxwalkspeed
	local runacceleration = runacceleration
	local walkacceleration = walkacceleration

	--HORIZONTAL MOVEMENT
	if runkey(self.playernumber) then --RUNNING
		if rightkey(self.playernumber) then --MOVEMENT RIGHT
			if self.jumping or self.falling then --IN AIR
				if self.speedx < maxwalkspeed then
					if self.speedx < 0 then
						self.speedx = self.speedx + runaccelerationair*dt*airslidefactor
					else
						self.speedx = self.speedx + runaccelerationair*dt
					end

					if self.speedx > maxwalkspeed then
						self.speedx = maxwalkspeed
					end
				elseif self.speedx > maxwalkspeed and self.speedx < maxrunspeed then
					if self.speedx < 0 then
						self.speedx = self.speedx + runaccelerationair*dt*airslidefactor
					else
						self.speedx = self.speedx + runaccelerationair*dt
					end

					if self.speedx > maxrunspeed then
						self.speedx = maxrunspeed
					end
				end

			elseif self.ducking == false then --ON GROUND
				if self.speedx < 0 then
					if self.speedx > maxrunspeed then
						self.speedx = self.speedx + superfriction*dt + runacceleration*dt
					else
						self.speedx = self.speedx + friction*dt + runacceleration*dt
					end
					self.animationstate = "sliding"
					self.animationdirection = "right"
				else
					self.speedx = self.speedx + runacceleration*dt
					self.animationstate = "running"
					self.animationdirection = "right"
				end

				if self.speedx > maxrunspeed then
					self.speedx = maxrunspeed
				end
			end

		elseif leftkey(self.playernumber) then --MOVEMENT LEFT
			if self.jumping or self.falling then --IN AIR
				if self.speedx > -maxwalkspeed then
					if self.speedx > 0 then
						self.speedx = self.speedx - runaccelerationair*dt*airslidefactor
					else
						self.speedx = self.speedx - runaccelerationair*dt
					end

					if self.speedx < -maxwalkspeed then
						self.speedx = -maxwalkspeed
					end
				elseif self.speedx < -maxwalkspeed and self.speedx > -maxrunspeed then
					if self.speedx > 0 then
						self.speedx = self.speedx - runaccelerationair*dt*airslidefactor
					else
						self.speedx = self.speedx - runaccelerationair*dt
					end

					if self.speedx < -maxrunspeed then
						self.speedx = -maxrunspeed
					end
				end

			elseif self.ducking == false then --ON GROUND
				if self.speedx > 0 then
					if self.speedx < -maxrunspeed then
						self.speedx = self.speedx - superfriction*dt - runacceleration*dt
					else
						self.speedx = self.speedx - friction*dt - runacceleration*dt
					end
					self.animationstate = "sliding"
					self.animationdirection = "left"
				else
					self.speedx = self.speedx - runacceleration*dt
					self.animationstate = "running"
					self.animationdirection = "left"
				end

				if self.speedx < -maxrunspeed then
					self.speedx = -maxrunspeed
				end
			end

		end
		if (not rightkey(self.playernumber) and not leftkey(self.playernumber)) or (self.ducking and self.falling == false and self.jumping == false) then  --NO MOVEMENT
			if self.jumping or self.falling then
				if self.speedx > 0 then
					self.speedx = self.speedx - frictionair*dt
					if self.speedx < minspeed then
						self.speedx = 0
						self.runframe = 1
					end
				else
					self.speedx = self.speedx + frictionair*dt
					if self.speedx > -minspeed then
						self.speedx = 0
						self.runframe = 1
					end
				end
			else
				if self.speedx > 0 then
					if self.speedx > maxrunspeed then
						self.speedx = self.speedx - superfriction*dt
					else
						self.speedx = self.speedx - friction*dt
					end
					if self.speedx < minspeed then
						self.speedx = 0
						self.runframe = 1
						self.animationstate = "idle"
					end
				else
					if self.speedx < -maxrunspeed then
						self.speedx = self.speedx + superfriction*dt
					else
						self.speedx = self.speedx + friction*dt
					end
					if self.speedx > -minspeed then
						self.speedx = 0
						self.runframe = 1
						self.animationstate = "idle"
					end
				end
			end
		end

	else --WALKING

		if rightkey(self.playernumber) then --MOVEMENT RIGHT
			if self.jumping or self.falling then --IN AIR
				if self.speedx < maxwalkspeed then
					if self.speedx < 0 then
						self.speedx = self.speedx + walkaccelerationair*dt*airslidefactor
					else
						self.speedx = self.speedx + walkaccelerationair*dt
					end

					if self.speedx > maxwalkspeed then
						self.speedx = maxwalkspeed
					end
				end
			elseif self.ducking == false then --ON GROUND
				if self.speedx < maxwalkspeed then
					if self.speedx < 0 then
						if self.speedx < -maxrunspeed then
							self.speedx = self.speedx + superfriction*dt + runacceleration*dt
						else
							self.speedx = self.speedx + friction*dt + runacceleration*dt
						end
						self.animationstate = "sliding"
						self.animationdirection = "right"
					else
						self.speedx = self.speedx + walkacceleration*dt
						self.animationstate = "running"
						self.animationdirection = "right"
					end

					if self.speedx > maxwalkspeed then
						self.speedx = maxwalkspeed
					end
				else
					self.speedx = self.speedx - friction*dt
					if self.speedx < maxwalkspeed then
						self.speedx = maxwalkspeed
					end
				end
			end

		elseif leftkey(self.playernumber) then --MOVEMENT LEFT
			if self.jumping or self.falling then --IN AIR
				if self.speedx > -maxwalkspeed then
					if self.speedx > 0 then
						self.speedx = self.speedx - walkaccelerationair*dt*airslidefactor
					else
						self.speedx = self.speedx - walkaccelerationair*dt
					end

					if self.speedx < -maxwalkspeed then
						self.speedx = -maxwalkspeed
					end
				end
			elseif self.ducking == false then --ON GROUND
				if self.speedx > -maxwalkspeed then
					if self.speedx > 0 then
						if self.speedx > maxrunspeed then
							self.speedx = self.speedx - superfriction*dt - runacceleration*dt
						else
							self.speedx = self.speedx - friction*dt - runacceleration*dt
						end
						self.animationstate = "sliding"
						self.animationdirection = "left"
					else
						self.speedx = self.speedx - walkacceleration*dt
						self.animationstate = "running"
						self.animationdirection = "left"
					end

					if self.speedx < -maxwalkspeed then
						self.speedx = -maxwalkspeed
					end
				else
					self.speedx = self.speedx + friction*dt
					if self.speedx > -maxwalkspeed then
						self.speedx = -maxwalkspeed
					end
				end
			end

		end
		if (not rightkey(self.playernumber) and not leftkey(self.playernumber)) or (self.ducking and self.falling == false and self.jumping == false) then --no movement
			if self.jumping or self.falling then
				if self.speedx > 0 then
					self.speedx = self.speedx - frictionair*dt
					if self.speedx < 0 then
						self.speedx = 0
						self.runframe = 1
					end
				else
					self.speedx = self.speedx + frictionair*dt
					if self.speedx > 0 then
						self.speedx = 0
						self.runframe = 1
					end
				end
			else
				if self.speedx > 0 then
					if self.speedx > maxrunspeed then
						self.speedx = self.speedx - superfriction*dt
					else
						self.speedx = self.speedx - friction*dt
					end
					if self.speedx < 0 then
						self.speedx = 0
						self.runframe = 1
						self.animationstate = "idle"
					end
				else
					if self.speedx < -maxrunspeed then
						self.speedx = self.speedx + superfriction*dt
					else
						self.speedx = self.speedx + friction*dt
					end
					if self.speedx > 0 then
						self.speedx = 0
						self.runframe = 1
						self.animationstate = "idle"
					end
				end
			end
		end
	end
end