ascent(i in 0..Shells)
			{
				let ShellID = ShellCount[i];
				if(ShellXDir[i] == 0)
				{
					ShellXDir[i] = ShellXDir[i] - 1;
				}
				if(ShellTimer%16<4)
				{
					ObjSprite2D_SetSourceRect(ShellID, 2, 74, 34, 106);
				}
				else if(ShellTimer%16<8)
				{
					ObjSprite2D_SetSourceRect(ShellID, 38, 74, 70, 106);
				}
				else if(ShellTimer%16<12)
				{
					ObjSprite2D_SetSourceRect(ShellID, 74, 74, 106, 106);
				}
				else
				{
					ObjSprite2D_SetSourceRect(ShellID, 110, 74, 142, 106);
				}
				ObjSprite2D_SetDestCenter(ShellID);

				ObjMove_SetX(ShellID, ObjMove_GetX(ShellID)+6*ShellXDir[i]);
				ObjMove_SetY(ShellID, ObjMove_GetY(ShellID)+ShellVelocityY[i]);
				ShellVelocityY[i]=ShellVelocityY[i]+0.25;
				if(ShellVelocityY[i] > 15)
				{
					ShellVelocityY[i] = 15;
				}
				if(ObjMove_GetY(ShellID) >= GetStgFrameHeight-5)
				{
					ShellVelocityY[i] = -13;
					ObjMove_SetY(ShellID, GetStgFrameHeight-6);
				}
				if(ObjMove_GetX(ShellID) <= 0)
				{
					ShellXDir[i] = -(ShellXDir[i]);
					ObjMove_SetX(ShellID, 1);
				}
				else if(ObjMove_GetX(ShellID) >= GetStgFrameWidth)
				{
					ShellXDir[i] = -(ShellXDir[i]);
					ObjMove_SetX(ShellID, GetStgFrameWidth-1);
				}
			}